The B-52 aircraft, callsign Czar 52,[1][page needed] took off at 13:58 and completed most of the mission's elements without incident. Upon preparing to execute the touch-and-go on Runway 23 at the end of the practice profile, the aircraft was instructed to go around because a KC-135 aircraft was on the runway, having just landed. Maintaining an altitude of about 250 feet (75 m) above ground level (AGL), Holland radioed the control tower and requested permission to execute a 360° left turn, which was immediately granted by the tower controller.[citation needed]