Here’s how big our nuclear arsenal is 80 years after the first atomic bomb

Atomic arsenal

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.

More deadly: Today’s nuclear weapons can be far more devastating than the horror that happened at Hiroshima on Aug. 6, 1945.

The circles above show the blast radius of the Hiroshima atomic bomb compared with a modern hydrogen bomb.

The Hiroshima bomb, nicknamed Little Boy, was air burst 1,900 feet above the city to maximize destruction; it was later estimated to yield 15 kilotons. Two-thirds of the city area was destroyed. The population present at the time was estimated at 350,000, and 140,000 died by the explosion and its radiation.

In the current U.S. nuclear arsenal, th