Marking Time Bruce Berkowitz - Barren County Schools

In the late 1940s, this delay had grown to about 43 months for an early jet fighter like the F-86 Sabre. By the 1960s, the F-4 Phantom required 66 months, and its 1970s replacement, the F-15 Eagle, 82 months. The latest fighter to enter service, the F-22 Raptor, traces its development to a prototype built under a contract signed in October 1986. ................
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