Energy Secretary Chris Wright said the testing ordered up in a surprise announcement by President Trump last week would focus ...

Questions have arisen after Russian President Vladimir Putin said his country tested two nuclear-capable weapons this week.

US intelligence pointed to Osama bin Laden hiding in the mountains of Afghanistan within the cave complexes several hundred feet below the ground. Then, in March of 2002, the Department of Defense and ...

NBC News’ Andrea Mitchell joins “Here’s the Scoop” co-host Yasmin Vossoughian to explain the difference between a weapons ...