Mr. GRAHAM ALLISON (Harvard University): During those three years, the North Koreans produced more plutonium, worked on their nuclear bomb test, worked on their missiles, tested their missiles.

NPR: North Korea Will Return to Talks, China Says

Under the Manhattan Project, several secret facilities were set up to build and test bomb components.

NPR: Revisiting the Birth of the Bomb

In 1952, Winston Churchill announced that Britain had produced its own atomic bomb and would test it in Australia.

CNN: Thursday,

For these descendants of the old Ban the Bomb and Nuclear Freeze movements, a test ban is not an end but a means.

CENTERFORSECURITYPOLICY: Test-Ban Trap

The Air Force quickly released video of the March test, which showed the bomb falling through the sky and bursting into a massive fireball upon impact.

CNN: MOAB bomb moved to Iraq war region

Aldridge said the test in Nevada involved dropping a laser-guided bomb into a tunnel and exploding it with a delayed fuse.

CNN: Pentagon to use new bomb on Afghan caves

The U.S. scientists who made the first uranium A-bomb, dubbed "Little Boy, " were so sure that it would work they did not bother to test it.

CNN: ASIANOW - Asiaweek