Hawaii residents covered their faces with masks after a volcano menacing the Big Island for weeks exploded, sending a mixture of pulverized rock, glass and crystal into the air in its strongest eruption of sandlike ash in days. The Kilauea volcano exploded at its summit shortly after 4...

Israeli strikes on targets in Syria last week took out several Russian missile defense systems and raised questions about the viability of Moscow’s military equipment. Israeli fighter jets had targeted Iranian bases in retaliation for Iranian strikes on the Golan Heights, and they...

Yemeni tribal and security officials say a missile fired by a suspected U.S. drone has killed three al-Qaeda militants who were driving in a vehicle in the country's south. They say the operatives were killed when an unmanned aircraft targeted their vehicle late Monday in the province...

NASA said on Friday it will send a small helicopter to Mars as part of the U.S. space agency's 2020 mission to place a next-generation rover on the Martian surface, marking the first time such an aircraft will be used on another world. The remote-controlled Mars Helicopter, designed to...