The 31st Fighter Wing received two new squadrons at that time, the 555th and 510th Fighter Squadrons, along with their Block-40 F-16s. The wing immediately became involved with events in Bosnia, part of the former communist country of Yugoslavia, in May 1994 as part of Operation Deny Flight. In June 1995, a massive search and rescue operation took place to extract Captain Scott O'Grady of the 555th Fighter Squadron who was shot down over Bosnian-Serb controlled territory in Bosnia. A U.S. Marine Corps CH-53 picked him up after he evaded capture for six days.