The 80th anniversary of the atomic bombing of Hiroshima and Nagasaki is this week. It was the only time nuclear warheads were used during war. Here’s a look at the history and current U.S. stockpile.

Hydrogen bombs cause a bigger explosion, which means the shock waves, blast, heat and radiation all have larger reach than an atomic bomb, according to Edward Morse, a professor of nuclear engineering ...

HIROSHIMA (Reuters) - Teruko Yahata was eight when she saw a blueish-white light envelop the sky over her home city of Hiroshima one summer morning, moments before the first atomic bomb explosion ...

A minute of silence was observed Saturday in Nagasaki, precisely at the time of the atomic bomb explosion dropped by a US bomber on the Japanese city 80 years ago, while the restored bell tower of the ...