 Until the end of the war in 1975, the 9th SRW gathered photographic and electronic intelligence data on the Southeast Asian nations involved in the conflict.Despite the SR-71's speed and operating altitude, crews risked their lives daily to obtain the latest and best reconnaissance data.Rescuers used SR-71 photos of North Vietnam to plan the 1970 raid on the Son Tay prisoner-of-war camp to free American Prisoners of war.