The 171st found itself among the first units called to duty almost immediately after the 9/11 terrorist attacks in New York City , Washington D.C. and in its own backyard in southwestern Pennsylvania on September 11 , 2001 with the hijacking and crash of United Airlines Flight 93 . At the time , almost all of the Wing 's aircraft were in a stand-down mode , while nearly all of its assigned aircraft were being converted to with the new Pacer-Crag cockpit and navigation upgrade
United Airlines Flight 93
United Airlines Flight 93
171st Air Refueling Wing