The Nimitz-class aircraft carrier USS Harry S. Truman (CVN 75) transits the Atlantic Ocean, Dec. 12, 2018.

The US military is practicing fending off enemy bombers attacking the homeland in a first-of-its-kind exercise

The ongoing exercise marks the first time four U.S. combatant commands and NORAD have come together to conduct homeland defense operations

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More problems with Air Force's new tanker could put the squeeze on the Pentagon's refueling capabilities, TRANSCOM chief says

Protracted delays on Boeing's new KC-46 tanker could leave the Pentagon with a shortage of refueling capacity, the head of U.S. Transportation Command warned on Tuesday