According to U.S. and British officials, 12 B-1 Air Force bombers from R.A.F. Fairford air base were withdrawn because of the risk of a drone attack ordered by Iran’s Islamic Revolutionary Guard Corps.

© Craigyoungmedia/UGC, via Reuters

MQ-9 Reaper drones — known for high-profile deadly strikes — have been shifted from Africa to Colombia and Ecuador, U.S. officials said.

© Heather Ainsworth for The New York Times