There are more than 23,000 nuclear weapons in the world and terrorists only need one to kill millions of people. How worried are you about this threat?

"Countdown to Zero," a new documentary written and directed by Lucy Walker (Devil's Playground, Blindsight) and produced by Academy Award winner Lawrence Bender (An Inconvenient Truth), examines the Cold War worries about "the bomb," and reveals the modern dangers of a nuclear disaster.

Nine countries currently possess these weapons of mass destruction, but rogue nations and terrorist groups are continuously trying to obtain such capabilities on the black market. To find out what is being done to stop them, the filmmakers interviewed world leaders, such as former U.S. President Jimmy Carter, former Soviet President Mikhail Gorbachev, former Pakistan President General Pervez Musharraf and former British Prime Minister Tony Blair, as well as security experts like former U.S. cabinet members Robert McNamara and James Baker III, and former CIA operative Valerie Plame Wilson.

listened to an interview this morning with the main guy behind this movie, who's the producer behind An Inconvenient Truth, and actually found what he was saying to be pretty damn interesting... kind of scary to think that it's actually more dangerous these days, at least on the nuclear front, than back in the Cold War era between the US and Soviets — the biggest concern obviously being some terrorists get their hands on a nuclear weapon... hence all the concern about Iran, Pakistan, and North Korea.