Enemy Captures

This is the site where I found the following information:

http://en.wikipedia.org/wiki/Boeing_B-17_Flying_Fortress

Luftwaffe captured B-17s

During World War II, after crash-landing or being forced down, approximately 40 B-17s were captured and refurbished, with about a dozen put back into the air. Given German markings on their wings and fuselages and Nazi swastika tail fin-flashes, the captured B-17s were used to determine the B-17's vulnerabilities and to train German interceptor pilots in attack tactics. Others, with the cover designations Dornier Do 200 and Do 288, were used as long-range transports by the Kampfgeschwader 200 special duties unit, carrying out agent drops and supplying secret airstrips in the Middle East and North Africa. They were chosen specifically for these missions as being more suitable for this role than other available German aircraft; they never attempted to deceive the Allies and always wore full Luftwaffe markings. One B-17 of KG200, bearing the Luftwaffe markings A3+FB, was interned by Spain when it landed at Valencia airfield, 27 June 1944, remaining there for the rest of the war.  Some B-17s kept their Allied markings and were used by the Luftwaffe in attempts to infiltrate B-17 bombing formations and report on their positions and altitudes. The practice was initially successful, but Army Air Force combat aircrews quickly developed and established standard procedures to first warn off, and then fire upon any "stranger" trying to join a group's formation.