Since their formation, the teams have rescued thousands of civilian walkers and climbers and responded to hundreds of aircraft crashes. Perhaps the most famous call-out of all was for the crash of Pan Am Flight 103 over Lockerbie, Scotland in 1988, also known as the Lockerbie Air Disaster. This terrorist incident resulted in the scattering of human remains over a wide swath of southern Scotland. The call-out involved four of the six teams then in existence and "stretched the personnel involved to the limits". Psychological effects on RAF MR troops that took part in the call-out were described in "Trauma" by Professor Gordon Turnbull, who was an RAF psychiatrist with personal knowledge of RAF MR.