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Northrop Grumman raised its annual profit forecast on Tuesday, betting on sustained demand for its military aircraft and ...

Nuclear weapons, including atomic and thermonuclear bombs, are among the most destructive forces known to humanity. These weapons of mass destruction harness the power of nuclear fission or a ...

Clean energy from nuclear fusion may soon be commercial. But leaders around the world have done little to prepare.

How difficult is it for a nation to build a nuclear bomb? Experts weighed in on the process after Trump ordered military strikes on Iran’s nuclear sites.

Unlike other countries that were able to develop nuclear weapons in secret, Iran cannot assume it will be able to keep its work hidden.

New satellite images appear to show Iran starting excavations at one of its nuclear sites hit by US bombs. In the images, Iran looks to be filling craters at Fordow and digging out access roads.

A terrifying new simulation reveals what really happens when a nuclear bomb detonates—and the truth is more horrifying than you think. From blindness and third-degree burns two miles away to ...

Experts disagree on how long it would take before Iran develops a bomb, but the disagreement stands on when, not whether.