There Was A Tug-Of-War Over F-35 Engines, Replacement
Tankers
The long-awaited F-35 flight test program got going in ernest in
2010, but there was still no agreement in Congress over whether
there should be an alternative engine. Airbus and Boeing continued
to spar over a replacement for the aging KC-153 tanker, and the
military tested several aircraft on biofuel blends.
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