Participants, acting as people who have not been able to return home due to a strong earthquake, wear protective blankets as they take part in a disaster drill at Yurakucho subway station in Tokyo March 11, 2013, to mark the second-year anniversary of the March 11, 2011 earthquake and tsunami that killed thousands and set off a nuclear crisis. The Tokyo Metro and Tokyo Metropolitan Government Bureau of Transportation on Monday held their joint evacuation drill to prepare for a major earthquake in Tokyo. Japan honours the victims of its worst disaster since World War Two on Monday: the March 11, 2011 earthquake, tsunami and nuclear crisis that killed almost 19,000 people and stranded 315,000 evacuees, including refugees who fled radiation from the devastated Fukushima atomic plant. REUTERS/Issei Kato (JAPAN - Tags: DISASTER ANNIVERSARY TRANSPORT) 

Katsunobu Sakurai, the mayor of Minamisoma, of the Fukushima prefecture, hit by the March 11 earthquake, tsunami and nuclear disaster, checks his radiation dose meter after giving a news conference at the Foreign Correspondents' Club of Japan in Tokyo June 9, 2011. In a video posted on YouTube some two weeks after the March 11 tsunami and earthquake disaster, the leader lashed at Japan's political and economic establishment, claiming his frantic calls were ignored and, as a result, left thousands of local residents stuck in a nuclear no-go zone. TIME Magazine listed Sakurai as one of the top 100 people of 2011 REUTERS/Yuriko Nakao (JAPAN - Tags: DISASTER POLITICS PROFILE ENERGY) 

An activist of the German 'Campact' association stages a protest at a subway train stop in Berlin, October 30, 2008. Several protesters took to the street to demonstrate against German atomic energy policy among an energy symposium in the German capital on Thursday afternoon. REUTERS/Tobias Schwarz (GERMANY) 

-PHOTO TAKEN 09JAN02-Concrete and stainless steel tubes house and protect the four-kilometer long laser apparatuses at the LIGO Hanford Observatory in Hanford, Washington, January 9, 2002. LIGO, which stands for Laser Interferometer Gravitational-Wave Observatory, has the mission to observe gravitational waves of cosmic origin, including those created by black holes, star collisions and remnants of gravitational radiation created by the "big-bang" birth of the universe. The LIGO Hanford facility houses laser interferometers consisting of mirrors suspended at each of the corners of a gigantic L-shaped vaccum system measuring four kilometers on each side. LIGO Hanford is part of a $370 National Science Foundation project focused at researching these gravitational waves. 

-PHOTO TAKEN 09JAN02-Wearing laser protective eyeglasses, Dr. Fred Raab, observatory head at the LIGO Hanford Observatory in Hanford, Washington, inspects the steel tubes that house the observatory's four-kilometer long laser apparatuses, January 9, 2002. LIGO, which stands for Laser Interferometer Gravitational-Wave Observatory, has the mission to observe gravitational waves of cosmic origin including those created by black holes, star collisions and remnants of gravitational radiation created by the "big-bang" birth of the universe. The LIGO Hanford facility houses laser interferometers consisting of mirrors suspended at each of the corners of a gigantic L-shaped vaccum system measuring four kilometers on each side. LIGO Hanford is part of a $370 National Science Foundation project focused at researching these gravitational waves. 

-PHOTO TAKEN 09JAN02-Dr. Fred Raab, observatory head at the LIGO Hanford Observatory in Hanford, Washington, uses binoculars to check up on the steel and concrete tubes that protect the four-kilometer long laser apparatuses, January 9, 2002. LIGO, which stands for Laser Interferometer Gravitational-Wave Observatory, has the mission to observe gravitational waves of cosmic origin including those created by black holes, star collisions and remnants of gravitational radiation created by the "big-bang" birth of the universe. The LIGO Hanford facility houses laser interferometers consisting of mirrors suspended at each of the corners of a gigantic L-shaped vaccum system measuring four kilometers on each side. LIGO Hanford is part of a $370 National Science Foundation project focused at researching these gravitational waves. 

Concrete and stainless steel tubes house and protect the four-kilometer
long laser apparatuses at the LIGO Hanford Observatory in Hanford,
Washington, January 9, 2002. LIGO, which stands for Laser
Interferometer Gravitational-Wave Observatory, has the mission to
observe gravitational waves of cosmic origin, including those created
by black holes, star collisions and remnants of gravitational radiation
created by the "big-bang" birth of the universe. The LIGO Hanford
facility houses laser interferometers consisting of mirrors suspended
at each of the corners of a gigantic L-shaped vaccum system measuring
four kilometers on each side. LIGO Hanford is part of a $370 National
Science Foundation project focused at researching these gravitational
waves. REUTERS/Anthony P. Bolante/FEATURE-SCIENCE-GRAVITY

APB/HB 

Wearing laser protective eyeglasses, Dr. Fred Raab, observatory head at
the LIGO Hanford Observatory in Hanford, Washington, inspects the steel
tubes that house the observatory's four-kilometer long laser
apparatuses, January 9, 2002. LIGO, which stands for Laser
Interferometer Gravitational-Wave Observatory, has the mission to
observe gravitational waves of cosmic origin including those created by
black holes, star collisions and remnants of gravitational radiation
created by the "big-bang" birth of the universe. The LIGO Hanford
facility houses laser interferometers consisting of mirrors suspended
at each of the corners of a gigantic L-shaped vaccum system measuring
four kilometers on each side. LIGO Hanford is part of a $370 National
Science Foundation project focused at researching these gravitational
waves. REUTERS/Anthony P. Bolante/FEATURE-SCIENCE-GRAVITY

APB/HB 

Dr. Fred Raab, observatory head at the LIGO Hanford Observatory in
Hanford, Washington, uses binoculars to check up on the steel and
concrete tubes that protect the four-kilometer long laser apparatuses,
January 9, 2002. LIGO, which stands for Laser Interferometer
Gravitational-Wave Observatory, has the mission to observe
gravitational waves of cosmic origin including those created by black
holes, star collisions and remnants of gravitational radiation created
by the "big-bang" birth of the universe. The LIGO Hanford facility
houses laser interferometers consisting of mirrors suspended at each of
the corners of a gigantic L-shaped vaccum system measuring four
kilometers on each side. LIGO Hanford is part of a $370 National
Science Foundation project focused at researching these gravitational
waves. REUTERS/Anthony P. Bolante/FEATURE-SCIENCE-GRAVITY

APB/HB