At no point did the Chinese have the president's 'nuclear football' in their possession or even touch the briefcase.
Daniel Ellsberg's latest book is a disturbing analysis about how close we have been -- and still are -- to a nuclear holocaus...
The U.S. is urging Russia to prove it's honoring an arms treaty from the Soviet era or to prepare for the pact to collapse.
Mattis said he was once a skeptic about maintaining ICBMs in the nuclear triad, but he has changed his mind.
Defense Secretary Mattis said new low-yield nuclear weapons would be bargaining chips for arms deals.
Defense Secretary Jim Mattis will brief lawmakers Tuesday on the overhaul of U.S. strategies against major threats.
China called on Washington to reduce its own much larger arsenal and join in promoting regional stability.
The Nuclear Posture Review also projected development of new low-yield warheads for ballistic missiles on submarines.
An employee who mistakenly sent an alert warning of an incoming missile thought an actual attack was imminent, the FCC said.
Defense Secretary Jim Mattis again pushed diplomacy as the solution to the North Korea crisis.