nuclear

Workers wearing protective gear rest at the Tokyo Electric Power Co. (TEPCO) Fukushima Dai-ichi nuclear power plant, Okuma, Fukushima prefecture, northeastern Japan

Shizuo Kambayashi/EPA

Workers wearing protective gear rest at the Tokyo Electric Power Co. (TEPCO) Fukushima Dai-ichi nuclear power plant, Okuma, Fukushima prefecture, northeastern Japan

A man adjusts a spotlight above the stage before world leaders' family picture during the Nuclear Security Summit in The Hague...A man adjusts a spotlight above the stage before world leaders' family picture during the Nuclear Security Summit in The Hague March 25, 2014.  REUTERS/Robin Van Lonkhuijsen/Pool (NETHERLANDS  - Tags: POLITICS)

Robin Van Lonkhuijsen/Reuters

The stage is set before world leaders have their family picture taken before the Nuclear Security Summit in The Hague, The Netherlands

Protestors with a radioactive sign painted on their faces pose during a demonstration on the first day of the two-day Nuclear Security Summit) in The Hague, Netherlands.

Patrick Post/AP

Protestors with a radioactive sign painted on their faces pose during a demonstration on the first day of the two-day Nuclear Security Summit in The Hague, Netherlands.

A general view of the hard-surfaced advanced recording base PEA "Denise" in the north zone of the Moruroa (Mururoa) atoll, southern Pacific ocean, where French forces have conducted 138 nuclear weapon tests until 1996. In order to prevent a potential collapse of the atoll, the ministry of Defense have scheduled improvement works on all its telesurveillance system, named Telsite, starting late 2014 and up to 2017, to monitor the sismic activity of the base. The Telsite system includes a network of sismic captors placed on the surface but also in wells hundreds of meters deep.

Gregory Boissy/AFP

PEA ‘Denise’ in the north zone of the Mururoa Atoll, in the southern Pacific Ocean, where the French military conducted nuclear weapons tests until 1996. The Ministry of Defence has scheduled improvement works starting in late 2014 to monitor the seismic activity of the base amid fears the atoll may collapse

A Tokyo Electric Power Co. (Tepco) employee wearing a protective suit and a mask walks past storage tanks for radioactive water in the H4 area at the Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima Prefecture, Japan, on 07 November 2013. Two experts from the International Atomic Energy Agency (IAEA) on 07 November 2013 began surveying radiation levels off the Japanese coast near the crippled Fukushima nuclear plant, amid growing fears of sea contamination.

Tomohiro Ohsumi/EPA

A Tokyo Electric Power employee wears a protective suit and mask to walk past storage tanks for radioactive water in the H4 area at the Fukushima Dai-ichi nuclear power plant in Okuma, Fukushima Prefecture, Japan.

An Iranian woman walks past a mural showing a gun painted with an interpretation of the American flag on the wall of the former US embassy in Tehran on September 25, 2013. Leaders from Iran and the United States have not met since the 1979 Islamic Revolution brought often open hostility to their contacts, particularly over Iran's contested nuclear program.

Atta Kenare/AFP

An Iranian woman walks past a mural showing a gun painted with an interpretation of the American flag on the wall of the former US embassy in Tehran on Wednesday. Leaders from Iran and the United States have not met since the 1979 Islamic Revolution brought often open hostility to their contacts, particularly over Iran’s contested nuclear program.

People offer prayer for atomic bomb victims at a cenotaph at the Hiroshima Peace Memorial Park in Hiroshima, western Japan, 06 August 2013 after the Peace Memorial Ceremony commemorating the 68th anniversary of the atomic bombing of the city  in 1945.

Kimimasa Mayama/EPA

People offer prayer for atomic bomb victims at a cenotaph at the Hiroshima Peace Memorial Park in Hiroshima, western Japan on Tuesday after the Peace Memorial Ceremony commemorating the 68th anniversary of the atomic bombing of the city in 1945.

.A North Korean worker checks his mobile phone as a soldier stands in front along the banks of Yalu River, near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong, June 7, 2013. China told a North Korean delegation that visited Beijing late last month that North Korea should stop conducting nuclear tests and focus on economic development, a source with knowledge of the talks told Reuters.

Jacky Chen/Reuters

A North Korean worker checks his mobile phone as a soldier stands in front along the banks of Yalu River, near the North Korean town of Sinuiju, opposite the Chinese border city of Dandong on Friday. China told a North Korean delegation that visited Beijing late last month that North Korea should stop conducting nuclear tests and focus on economic development, a source with knowledge of the talks told Reuters.

Iran presidential elections...epa03728813 A female supporter of Iranian presidential candidate Saeed Jalili holds a picture depicting Jalili during an election campaign event at the Tehran University in Tehran, Iran, 03 June 2013. Jalili said that in case of an election victory he would make no compromise in the dispute over Iranís controversial nuclear programmes. Iran will hold presidential elections on 14 June 2013.  EPA/ABEDIN TAHERKENAREH

Abedin Taherkenareh/EPA

A female supporter of Iranian presidential candidate Saeed Jalili during an election campaign event at the Tehran University on Monday. Mr Jalili said that in case of an election victory he would make no compromise in the dispute over Iran’s controversial nuclear programme. Iran will hold presidential elections on June 14. 

wiss air force helicopter transports mobile water pump during exercise in front of the nuclear power plant near Leibstadt...A Swiss air force helicopter transports a mobile water pump during an exercise in front of the nuclear power plant near the northern Swiss town Leibstadt May 28, 2013. The Swiss Federal Nuclear Safety Inspectorate (ENSI) tested, in co-operation with Swiss air force and the power plant operators, the transport of technical emergency equipment by air.   REUTERS/Arnd Wiegmann (

Arnd Wiegmann/Reuters

A Swiss Air Force helicopter on Tuesday transports a mobile water pump during an exercise in front of the nuclear power plant near the northern Swiss town Leibstadt. The Swiss Federal Nuclear Safety Inspectorate tested, in co-operation with the air force and the power plant operators, the transport of technical emergency equipment by air.

India's Central Industrial Security Force (CISF) sub inspectors and executives of the 38th batch at National Industrial Security Academy (NISA)  march during their passing out parade of on the outskirts of Hyderabad, India, Friday, May 17, 2013. The CISF is a paramilitary security force which provides security cover to nuclear installations, space establishments, airports, seaports, power plants, sensitive Government buildings and heritage monuments in India.

Mahesh Kumar /AP

India’s Central Industrial Security Force sub inspectors and executives of the 38th batch at National Industrial Security Academy march during their passing out parade on the outskirts of Hyderabad, India. The CISF is a paramilitary security force that provides security cover for nuclear installations, space establishments, airports, seaports, power plants, sensitive government buildings and heritage monuments in India.

A man, center, supervises a dancing group  during a mass folk dance in front of the Pyongyang Indoor Stadium in Pyongyang, North Korea, Monday, April 15, 2013. Oblivious to international tensions over a possible North Korean missile launch, Pyongyang residents spilled into the streets Monday to celebrate a major national holiday, the birthday of their first leader, Kim Il Sung.

Alexander F. Yuan/AP

A man, center, supervises a dancing group during a mass folk dance in front of the Pyongyang Indoor Stadium in Pyongyang, North Korea, Monday, April 15, 2013. Oblivious to international tensions over a possible North Korean missile launch, Pyongyang residents spilled into the streets Monday to celebrate a major national holiday, the birthday of their first leader, Kim Il Sung.

 Anti Trident demonstrators block the one of the entrances to Faslane naval base on April 15, 2013 in Faslane, Scotland. Activists from across the country, calling for the Trident missile program to be scrapped, converged on the home of Trident to blockade the gates which caused traffic disruption into the naval base.

Jeff J Mitchell/Getty Images

Anti-Trident demonstrators block one of the entrances to Faslane naval base on April 15 2013 in Faslane, Scotland. Activists from across the country, calling for the Trident missile programme to be scrapped, converged on the home of Trident to blockade the gates, causing traffic disruption into the naval base.

Retired North Korean military members stand at attention during an induction ceremony for children into the Korean Children's Union, the first political organization for North Koreans, held at a stadium in Pyongyang on Friday, April 12, 2013.

David Guttenfelder/AP

Retired military officers of North Korea stand at attention during an induction ceremony for children into the Korean Children’s Union, the first political organisation for North Koreans, held at a stadium in Pyongyang on Friday.