sentences:  During World War II, after crash-landing or being forced down, approximately 40 B-17s were repaired and put back into the air by the Luftwaffe.These captured aircraft were codenamed "Dornier Do 200", given German markings and used for clandestine spy and reconnaissance missions by the Luftwaffe - most often used by the Luftwaffe unit known as KG 200, hence a likely possibility as a source for the "Do 200" codename.When Israel achieved statehood in 1948, the Israeli Air Force had to be assembled quickly to defend the new nation from the war it found itself almost immediately embroiled in.