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

Touting new weapons tests, Moscow signals to Washington that it must contend with the Kremlin’s power and negotiate.

This week alone, the Russian president unveiled two nuclear-capable weapons - but their value may be more symbolic than military.

Defense startup Castelion said on Friday it has won contracts to integrate its Blackbeard hypersonic strike weapon with current U.S. Army systems, the first step toward allowing the military to place the powerful and nearly unstoppable weapons around the world.

North Korea is one potential villain in a fictional movie about nuclear war on Netflix, Kathryn Bigelow’s “A House of Dynamite.” It is a “Rashomon”-style thriller about the concept of mutually assured destruction that the filmmakers mean to be a wakeup call for nuclear powers.

The Nevada Test Site — where the U.S. last tested a nuclear explosive more than 30 years ago — now relies on computer modeling, not physical explosions.