“The SR-71 flew for 17 straight years (1972-1989) without a loss of plane or crew. Considering the environment the Blackbirds flew in, that is an enviable safety record.”
As I recall, there was at least one which crashed in Oklahoma.
Perhaps you meant that no SR-71 was ever lost due to enemy action?
No blackbirds were lost between the crash of 61-7978 (7/20/72) and 61-7974 (4/21/89). All 20 losses were due to accidents or malfunctions. No SR-71s have ever been lost to enemy action.