Iran cannot use 60% enriched uranium directly in its current form (UF₆, which is stored as a solid in cylinders but handled as a gas or liquid during ...

On July 16, 1945, the United States conducted the world’s first-ever nuclear test, known as the Trinity test, in the desert of New Mexico. This test marked a watershed moment in history, not only ...

From 1942 to 1945, the Manhattan Project had operated in secret to develop a weapon more fearsome than anything the world had ever seen. Now, in mid-July, they were ready — or at least, they hoped so.

Thankfully, no party has used nuclear weapons in war since 1945. Treaties limiting nuclear tests and weapon inventories during the Cold War highlighted the pragmatism of world leaders. As memories ...

If President Donald Trump does decide to use the United States' largest conventional bomb to destroy Iran’s fortresslike Fordo nuclear enrichment facility, the colossal force of the explosion would ...

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.

The photos, he says, are part scientific study and part propaganda, a measure of America’s technological progress and the power of its arsenal. They are also, in a way the Pentagon likely never ...

Energy Secretary Chris Wright said the testing ordered up in a surprise announcement by President Trump last week would focus on “the other parts” of nuclear weaponry. By Zolan Kanno-Youngs The ...