26-11-2013 - A rebuilt Mark 2 Colossus computer. Colossus was one of the world's first electronic digital computer that was at all programmable. The Colossus computers were developed for British codebreakers durin... © John Harris

26-11-2013 - The working rebuilt bombe decrypting computer, Bletchley Park Museum, Milton Keynes © John Harris

26-11-2013 - The working rebuilt bombe decrypting computer, Bletchley Park Museum, Milton Keynes © John Harris

26-11-2013 - The working rebuilt bombe decrypting computer, Bletchley Park Museum, Milton Keynes © John Harris

26-11-2013 - The working rebuilt bombe decrypting computer, Bletchley Park Museum, Milton Keynes © John Harris

01-07-2013 - Government Communications Headquarters (GCHQ), Cheltenham, Gloucestershire. The UK Intelligence Agency intended to gather information on international terrorism and serious organised crime. © John Harris

01-07-2013 - Government Communications Headquarters (GCHQ), Cheltenham, Gloucestershire. The UK Intelligence Agency intended to gather information on international terrorism and serious organised crime. © John Harris

07-11-2012 - Athens, Greece-Firefighters putting out a building set on fire by protesters. Protests on the second of a two day general strike against austerity. © Socrates Baltagiannis

07-08-2011 - Tottenham Riots. Riot police clashing with hundreds of rioters after the fatal shooting of Mark Duggan, 29, who was killed by police on Thursday. North London © Paul Mattsson

07-08-2011 - Tottenham Riots. Firefighters climbing ladders to vcheck for occupents as fires spread after the fatal shooting of Mark Duggan, 29, who was killed by police on Thursday. North London © Paul Mattsson

07-08-2011 - Tottenham Riots. Firefighters trying to put out fires after the fatal shooting of Mark Duggan, 29, who was killed by police on Thursday. North London © Paul Mattsson

07-08-2011 - Tottenham Riots. Firefighters trying to put out fires after the fatal shooting of Mark Duggan, 29, who was killed by police on Thursday. North London © Paul Mattsson

07-08-2011 - Tottenham Riots. Firefighters trying to put out fires after the fatal shooting of Mark Duggan, 29, who was killed by police on Thursday. North London © Paul Mattsson

07-08-2011 - Tottenham Riots. Firefighters trying to put out fires after the fatal shooting of Mark Duggan, 29, who was killed by police on Thursday. North London © Paul Mattsson

07-08-2011 - Tottenham Riots. Carpetright burning down. Firefighters trying to put out fires, after the fatal shooting of Mark Duggan, 29, who was killed by police on Thursday. North London © Paul Mattsson

07-08-2011 - Tottenham Riots. Firefighters trying to put out fires after the fatal shooting of Mark Duggan, 29, who was killed by police on Thursday. North London © Paul Mattsson

24-09-2010 - An unarmed Minuteman II missile in its underground launch silo. The silo, known as launch facility Delta Nine (D-09) was operational in 1963. Following the end of the Cold War, many missile sites were... © Jim West

24-09-2010 - Ranger giving a guided tour of the underground launch control center for Minuteman II missiles. This is where Air Force officers known as missileers worked 24 hours shifts remotely commanding and cont... © Jim West

24-09-2010 - Artwork and political commentary on the wall of the underground launch control center for Minuteman II missiles showing a missile breaking through a Soviet flag. The silo, known as launch facility Del... © Jim West

20-11-2009 - Hunger striker Raymond McCartney in the H Block prison a Republican mural in the Peoples Gallery by the Bogside Artists, Derry © Howard Davies

20-11-2009 - The schoolgirl Annette McGavigan (shot by a British soldier in 1971) in a mural in the Peoples Gallery by the Bogside Artists, Derry. © Howard Davies

20-11-2009 - Republican murals showing British soldier forcing a door during Operation Motorman and The Runner, the Peoples Gallery by the Bogside Artists, Derry. © Howard Davies

20-11-2009 - The politician John Hume, and the famous civil rights leaders Martin Luther King, Mother Theresa and Nelson Mandela in a mural in the Peoples Gallery by the Bogside Artists, Derry. © Howard Davies

20-11-2009 - Civil Rights march mural, in the Peoples Gallery by the Bogside Artists, Derry. © Howard Davies

20-11-2009 - The Saturday Matinee mural showing rioting against British army, a Republican mural in the Peoples Gallery by the Bogside Artists, Derry. © Howard Davies

20-11-2009 - Republican murals showing British soldier forcing a door during Operation Motorman, the Peoples Gallery by the Bogside Artists, Derry. © Howard Davies

20-11-2009 - The revolutionary Che Guevara in a Republican mural in the Peoples Gallery by the Bogside Artists, Derry. © Howard Davies

20-11-2009 - Mural commemorating Bloody Sunday, one of the Republican murals in the Peoples Gallery by the Bogside Artists, Derry. Northern Ireland © Howard Davies

20-11-2009 - A petrol bomber with a gas mask and a molotov cocktail during the Battle of the Bogside, a Republican mural in the Peoples Gallery by the Bogside Artists, Derry. © Howard Davies

20-11-2009 - A petrol bomber with a gas mask and a molotov cocktail during the Battle of the Bogside, a Republican mural in the Peoples Gallery by the Bogside Artists, Derry. © Howard Davies

30-07-2009 - Public at the funeral of Henry Allingham, World War I veteran and aged 113 the oldest man in world, at the time of his death. St Nicholas Church, Brighton UK 2009 © Howard Davies

11-11-2008 - Ex-military personnel saluting during a two minute silence at Armistice Day in Trafalgar Square. Remember all those whose lives have been lost through war and armed conflict. London. © Justin Tallis

11-11-2008 - Rolf Harris and Ben Shepherd talking at Armistice Day in Trafalgar Square to remember all those whose lives have been lost through war and armed conflict. London. © Justin Tallis

25-07-2008 - In September 1997 Handicap International unveiled the Broken Chair outside the United Nations in Geneva, Switzerland. The 12 metre high wooden sculpture was made by Swiss artist Daniel Berset in suppo... © Philip Wolmuth

04-05-2008 - A wounded anti autonomist being evacuated towards an hospital after his group marched towards a voting station to ransack it and voters defended themselves in Santa Cruz, on Sunday, May 4, 2008. Campa... © Boris Heger

27-11-2007 - Afghanistan The owner of a small real estate agency prepares to go to the hospital following a suicide attack that targeted a foreign military convey in Kabul on November 27th. The suicide car bomb ki... © Elissa Bogos

30-09-2007 - Jewish settlers chant and pray on a hill called Eitam, near Bethleem, ahead of gathering stones to establish some structures to establish an outpost settlement. Israeli settlers and rightwing groups a... © Morris Bernard

27-07-2006 - Shifa Hospital. Gaza City. A man lies badly injured by an Israeli tank shell, in the hospital which is struggling to cope with the mounting injured brought every day. Over 20 Palestinians were serious... © Thomas Morley

27-07-2006 - Shifa Hospital. Gaza City. A man lies badly injured by an Israeli tank shell, in the hospital which is struggling to cope with the mounting injured brought every day. Over 20 Palestinians were serious... © Thomas Morley

27-07-2006 - Shifa Hospital. Gaza City. A man lies badly injured by an Israeli tank shell, in the hospital which is struggling to cope with the mounting injured brought every day. Over 20 Palestinians were serious... © Thomas Morley

27-07-2006 - Shifa Hospital. Gaza City. Doctors struggle to save the life of a five year old boy hit by an Israeli tank shell, in the hospital which is struggling to cope with the mounting injured brought every da... © Thomas Morley

27-07-2006 - Shifa Hospital. Gaza City. A man badly injured by an Israeli tank shell is rushed to emergency, in the hospital which is struggling to cope with the mounting injured brought every day. Over 20 Palesti... © Thomas Morley

27-07-2006 - Shifa Hospital. Gaza City. A man badly injured by an Israeli tank shell is rushed to emergency, in the hospital which is struggling to cope with the mounting injured brought every day. Over 20 Palesti... © Thomas Morley

27-07-2006 - Shifa Hospital. Gaza City. A man lies badly injured by an Israeli tank shell, in the hospital which is struggling to cope with the mounting injured brought every day. Over 20 Palestinians were serious... © Thomas Morley

27-07-2006 - Shifa Hospital. Gaza City. A man badly injured by an Israeli tank shell is rushed through to the emergency room, in the hospital which is struggling to cope with the mounting injured brought every day... © Thomas Morley

27-07-2006 - Shifa Hospital. Gaza City. A man lies badly injured by an Israeli tank shell, in the hospital which is struggling to cope with the mounting injured brought every day. Over 20 Palestinians were serious... © Thomas Morley

27-07-2006 - Shifa Hospital. Gaza City. A man badly injured by an Israeli tank shell is rushed through to the emergency room, in the hospital which is struggling to cope with the mounting injured brought every day... © Thomas Morley

23-07-2006 - RamBam Hospital Haifa. Military transport and rescue helicopter lands to pick up medical team for the front line in Lebanon. © Thomas Morley

23-07-2006 - RamBam Hospital Haifa. An Israeli soldier stands guard while a military transport and rescue helicopter lands to pick up medical team for the front line in Lebanon. © Thomas Morley

21-07-2006 - One of the rockets fired by Hezbollah, hits the post office and blows out the window of a shop. Thirty people have been injured, many seriously, during these attacks. Haifa, Israel 2006 © Thomas Morley

14-07-2006 - A Sukhoi SU-35 on display, at Farnborough International Airshow in Hampshire, U.K. © Rogan Macdonald

14-07-2006 - A marine stands guard by the V-22 Osprey at Farnborough International Airshow in Hampshire, U.K © Rogan Macdonald

14-07-2006 - Members of the American Military observe the V-22 Osprey at Farnborough International Airshow in Hampshire, U.K © Rogan Macdonald

14-07-2006 - The V-22 Osprey taking off at Farnborough International Airshow in Hampshire, U.K © Rogan Macdonald

14-07-2006 - The V-22 Osprey at Farnborough International Airshow in Hampshire, U.K © Rogan Macdonald

28-05-2006 - A war wounded child learning to walk with his new orthopaedic prosthesis as his mother watches, orthopaedic center, Khartoum, Sudan, 2006 © Boris Heger

28-05-2006 - A war wounded woman learning to walk with her new orthopaedic prosthesis, orthopaedic center, Khartoum, Sudan, 2006 © Boris Heger

28-05-2006 - War wounded children learning to walk with their new orthopaedic prosthesis with their assistant and mother watching, orthopaedic center, Khartoum, Sudan, 2006 © Boris Heger

28-05-2006 - A war wounded woman takes a look at her new orthopaedic prosthesis those shoe reads "ok" as she waits for the doctor to arrive for trying it for the first time, at the states orthopaedic center, Khart... © Boris Heger

28-05-2006 - Darfur, Sudan. War wounded men try and learning how to walk with their new orthopaedic prosthesis, at a states orthopaedic center, Nyala, Darfur region, Sudan, May 2006. © Boris Heger

28-05-2006 - A new orthopaedic prothesis those shoe reads "ok", at the states orthopaedic center, Khartoum, Sudan, May 2006. © Boris Heger

27-05-2006 - War wounded child learning to walk with his new orthopaedic prosthesis as his mother watches on in background, state orthopaedic center, Khartoum, Sudan, 2006 © Boris Heger

07-05-2006 - A woman displaced by the violence is being measured at field hospital, IDP camp of Gereida, Darfur region, Sudan, May 2006. © Boris Heger

07-05-2006 - A child is being vaccinated at a malnutrition rehabilitation center, IDP camp of Gereida, Darfur region, Sudan, May 2006. © Boris Heger

07-05-2006 - A child is being vaccinated at a malnutrition rehabilitation center, rIDP camp of Gereida, Darfur region, Sudan, May 2006. © Boris Heger

06-05-2006 - People displaced by the violence wait for their turn at a field hospital, IDP camp of Gereida, Darfur region, Sudan, May 2006. © Boris Heger

21-02-2006 - An elderly sick woman is being checked by a doctor at the medical clinic in the ICRC supported health centre in Voinjama, near the border with Guinea, Lofa County, Liberia, February 2006. © Boris Heger

20-01-2006 - A nurse closes a bullet hole in the neck of Wubishet Solomon, 16, in a hospital in Addis Ababa, Ethiopia, on Friday, January 20, 2006. People at a church ceremony threw stones at Abuna Paulos, the Pop... © Boris Heger

20-01-2006 - Relatives of a wounded boy (center) bring him in a hospital in Addis Ababa, Ethiopia, on Friday, January 20, 2006 after he was shot by the police. People at a church ceremony threw stones at Abuna Pau... © Boris Heger

07-11-2005 - Another violent night in the Paris suburbs. A garage, Renault car dealer is set ablaze. 120 CRS (riot police officers) and 200 firefighters intervene. Safety zone secured by policemen, police officers... © Sebastien ORTOLA

07-11-2005 - Urban riots in Toulouse (Southwestern France). Firefighters intevene on a bus , set ablaze, at the beginning of the 12th night of urban violence in the district of la Reynerie, Toulouse © Jean Philippe Arles

05-11-2005 - Urban violence, outskirts of Paris, suburbs. Fabric warehouse destroyed, burnt down by fire, firefighters. © Marta NASCIMENTO

05-11-2005 - Urban violence, outskirts of Paris, suburbs. Fabric warehouse destroyed, burnt down by fire, firefighters © Marta NASCIMENTO

04-11-2005 - Two fabric warehouses set ablaze in the poor suburbs, outside of Paris. Two fabric warehouses set on fire street Danielle Casanova. Police officers protecting firefighters © Sebastien ORTOLA

04-11-2005 - 8th night of riots and urban violence in the Eastern outskirts of Paris. Firefighters intervene, fire, vehicle set ablaze in Le Blanc-Mesnil © Sebastien ORTOLA

04-11-2005 - 8th night of riots and urban violence in the Eastern outskirts of Paris. Timber warehouse (from the Panofrance Barjonet wholesaler) set on fire at Le Bourget. Intervention of firefighters equiped with... © Sebastien ORTOLA

04-11-2005 - 8th night of riots and urban violence in the Eastern outskirts of Paris. Timber warehouse (from the Panofrance Barjonet wholesaler) set on fire at Le Bourget. Intervention of firefighters equiped with... © Sebastien ORTOLA

02-11-2005 - Shops burning,urban riot after two teenagers were electrocuted whilst being chased by police at Clichy sous Bois. Firefighters, the Mondial Moquette store burning down © Sebastien ORTOLA

02-11-2005 - Shops burning,urban riot after two teenagers were electrocuted whilst being chased by police at Clichy sous Bois. Firefighters, the Mondial Moquette store burning down © Sebastien ORTOLA

02-11-2005 - Shops burning,urban riot after two teenagers were electrocuted whilst being chased by police at Clichy sous Bois. Firefighters, the Mondial Moquette store burning down © Sebastien ORTOLA

02-11-2005 - Shops burning,urban riot after two teenagers were electrocuted whilst being chased by police at Clichy sous Bois. Firefighters, the Mondial Moquette store burning down © Sebastien ORTOLA

02-11-2005 - The Mondial Moquette store ,located near the main road N3, in Bondy , is burning down . Clash during the night (tuesday to wednesday),spread to four Eastern Parisian departments . Urban violence after... © Sebastien ORTOLA

02-11-2005 - Urban tensions in Sevran, after two underaged youths were killed in Clichy sous Bois. Clash during the night (tuesday to wednesday),spread to four Eastern Parisian departments . Several garbage bags a... © Sebastien ORTOLA

02-11-2005 - Urban tensions in Sevran, after two underaged youths were killed in Clichy sous Bois . Clash during the night (tuesday to wednesday),spread to four Eastern Parisian departments . Police officers inter... © Sebastien ORTOLA

02-11-2005 - Urban tensions in Sevran, after two underaged youths were killed in Clichy sous Bois. Clash during the night (tuesday to wednesday),spread to four Eastern Parisian departments . Police officers interv... © Sebastien ORTOLA

02-11-2005 - Urban tensions in Sevran, after two underaged youths were killed in Clichy sous Bois. Clash during the night (tuesday to wednesday),spread to four Eastern Parisian departments . Police officers interv... © Sebastien ORTOLA

02-11-2005 - Shops burning,urban riot after two teenagers were electrocuted whilst being chased by police at Clichy sous Bois. Firefighters, the Mondial Moquette store burning down © Sebastien ORTOLA

02-11-2005 - Shops burning,urban riot after two teenagers were electrocuted whilst being chased by police at Clichy sous Bois. Firefighters, the Mondial Moquette store burning down © Sebastien ORTOLA

30-10-2005 - Death of two youths , electrocuted in an electricity sub-station at Clichy sous Bois, outside of Paris, on October 27th. Riots broke out, van set ablaze in the cities surrounding Clichy sous Bois, dur... © Sebastien ORTOLA

14-07-2005 - Two minute silence at Kings Cross station for the victims of terrorist bombings, London. © Duncan Phillips

14-07-2005 - Two minute silence at Kings Cross station for the victims of terrorist bombings, London. © Duncan Phillips

14-07-2005 - Two minute silence at Kings Cross station for the victims of terrorist bombings, London. © Duncan Phillips

14-07-2005 - Two minute silence at Kings Cross station for the victims of terrorist bombings, London. © Duncan Phillips

14-07-2005 - Two minute silence at Kings Cross station for the victims of terrorist bombings, London. © Duncan Phillips

14-07-2005 - Signing the condolence book at the Two minute silence at Kings Cross station for the victims of terrorist attack, London. © Duncan Phillips

14-07-2005 - Christian Minister supporting the Two minute silence at Kings Cross station for the victims of terrorist attack,london. © Duncan Phillips

14-07-2005 - Floral tributes Kings Cross station for the victims of terrorist attack,london. © Duncan Phillips

14-07-2005 - Upset Woman at Floral tributes Kings Cross station for the victims of terrorist attack,london. © Duncan Phillips

14-07-2005 - Two minute silence at Kings Cross station for the victims of terrorist bombings, London. © Duncan Phillips

14-07-2005 - Crowds gather at Kings Cross for two minutes silence, to commemorate those killed by the terrorist bombings in London. © Geoff Crawford