Ramstein Air Base and German police officials confirmed Monday that unauthorized drones have flown over the Air Force installation in recent days, though details about the unmanned aircraft remain scarce.

Former House Speaker Nancy Pelosi had hip replacement surgery Saturday at the Landstuhl Army hospital in Germany after falling while at an event in Luxembourg with other members of Congress.

Organizers said their emphasis on lengthier field treatment was a relatively new facet of the competition that anticipated wars in which U.S. forces no longer control the skies and cannot quickly evacuate the wounded.