The Boeing-made KC-135 is a mid-air refueling aircraft that’s been in service since the late 1950s. The RC-135 was introduced in the 1960s and the WC-135 “Constant Phoenix” in 1965.

An airman marshals an RC-135 Rivet Joint surveillance aircraft into position July 24, 2015, at Al Udeid Air Base, Qatar. The RC-135 Rivet Joint aircraft has maintained a constant presence in the ...

The Air Force inspector general is examining whether secretive National Guard surveillance aircraft improperly monitored demonstrators in Washington and Minneapolis. By Eric Schmitt and Thomas ...