Nuclear bombs do not rely on size, they rely on physics. Here is how chain reactions and hydrogen bombs unleash power on a ...

HARRY S TRUMAN: A short time ago, an American airplane dropped one bomb on Hiroshima and destroyed its usefulness to the enemy. That bomb has more power than 20,000 tons of TNT. SIMON: It was an ...

This week marks 80 years since the US dropped atomic bombs on Hiroshima and Nagasaki — killing an estimated 200,000 people. Historian Garrett Graff’s new book “The Devil Reached Toward the Sky” draws ...