With a flight lasting twenty-six hours and one minute, the US Navy experimental unmanned aerial vehicle Ion Tiger broke a flight endurance record. Michael Barkoviak writes for Daily Tech: The U.S. Navy's Ion Tiger fl...

That stands for "vertical take off and landing", not in the way that a helicopter does, but more like the tilt-rotor V-22 Osprey in the U.S. military inventory. As the U.S. Air Force is moving toward a greater role for...