Ukrainian President Volodymyr Zelenskyy refused to sign an agreement to grant the United States 50 percent of all future reserves of rare earth metals in Ukraine, according to news reports following a ...

Speculation is swirling after a US Air Force plane often used for sensitive missions made a short stint in Moscow. The US Air ...

In the 1950s, the U.S. military envisioned a game-changing fighter jet—the Bell D-188, a vertical takeoff and landing (VTOL) aircraft with eight jet engines. Designed to operate from remote locations ...

A Russian drone has struck the vast protective shell covering the Chernobyl nuclear power plant, Ukraine said on Friday.