Meanwhile, at another unnamed Air Force installation, Technician Webb reported the RADAR contact, and his superior ordered Captain John Christopher, a fighter pilot, to intercept what was then believed to be a UFO. In one version of history, Christopher's aircraft was caught and crushed by the Enterprise's tractor beam. Captain Kirk and Lieutenant Sulu infiltrated the 498th Air Base to retrieve the photographic and audio records of the incident that were recovered from the wreckage of Christopher's aircraft. Later, Spock devised a way to replay history that effectively erased the Enterprise's presence altogether. Its brief appearance was doubtless logged as one more strange aerial incident.