. "20th Tactical Reconnaissance Squadron, Photographic-Jet (later, 20th Tactical Reconnaissance)" . . "20th Tactical Reconnaissance Squadron" . . "20th Operations Squadron" . . . "20th Observation Squadron (later 20th Reconnaissance Squadron, 20th Tactical Reconnaissance Squadron)" . "20th" . . . . . . . . . . . . . "20th Special Operations Squadron" . . "1942" . . . "Special operations" . . . . . . . "Special Operations" . . . "20th Special Operations Sqn" . . "20th Helicopter Squadron" . . . "1945" . . "20th Special Operations Squadron" . "20th Special Operations" . . . . . "20th SOS" . "150px" .