While not seen as an environmental issue at the time, nuclear weapons pose the single biggest threat to the Earth's environment, scientists warned in 2006.
Saudi Arabia recently announced its intention to launch its own nuclear program, saying it needs to diversify its energy sources.
Created in 1947 to represent the relative closeness of the threat of nuclear disaster, the clock's face has been adjusted twenty times.
Israel's Supreme Court last Thursday kept in place a range of restrictions on the rights of nuclear whistleblower Mordechai Vananu, while his fight to secure asylum elsewhere continues.
Though eclipsed in recent months by the Arab Spring and the international economic crisis, Korea remains volatile, with the states on both sides of the DMZ trading threats.
The energy's always greener on the other side...of the world, that is. Particularly, in China.
After years out of the headlines - and out of most people's minds - this year nuclear weapons policy and the path to complete abolition has come to the fore again.
Sasha Polakow-Suransky's book "Unspoken Alliance: Israel's Secret Relationship with Apartheid South Africa" has ripped the lid off the secret world of unholy alliances and weapons of mass destruction.
Iran's president declared his country can produce nuclear weapons fuel, Secretary of State Hillary Clinton said Iran is becoming a military dictatorship, and the White House grapples with policy options.