Nuclear Weapons

The National Nuclear Security Administration said planning and construction could cost $4 billion initially.

Sri Lankan authorities expelled an Antigua-registered ship that entered the island's territory without declaring a...

To make repairs, airmen are often forced to take parts from another machine.

Nearly three dozen House Democrats are arguing that no single person should wield apocalyptic military power.

He negotiated the first-ever treaty to reduce the size of the Soviet Union’s ground-based nuclear arsenals.

The treaty limits each country to no more than 1,550 deployed nuclear warheads and 700 deployed missiles and bombers.

Iran has begun construction at its Natanz nuclear facility, satellite images released Wednesday show.

Putin’s move comes amid uncertainty surrounding the New START arms control treaty that expires in February.

U.N. Secretary-General Antonio Guterres called the nuclear weapons ban treaty “a very welcome initiative."

Russia said it’s ready to accept a U.S. proposal to freeze the number of warheads and extend the New START treaty for a year...