A view of Midland, TX from the bombardier's seat of Fifi. Kevin
Leas for The Wall Street Journal  MIDLAND, Texas—By the end of
World War II, nearly 4,000 Boeing B-29 Superfortresses had been
built, most of them to rain bombs on targets across the Pacific
Theater. Today, there's only one B-29 still flying, and she's
nicknamed "Fifi."  At a time when most vintage warplanes have
retired to a quiet life on display in drafty museums, 65-year-
old Fifi is embarking on a new mission: giving rides to paying
enthusiasts and once again making the air-show rounds, which
occasionally feature a simulated atomic-bomb attack.  Fifi's
current assignment follows a long journey back from near
obsolescence. To make her return to the skies, she required a
four-year, multimillion dollar engine overhaul, and her owners
had to navigate through a protracted spat with the Federal
Aviation Administration for renewed clearance to fly.  In its
prime, the B-29 was the most sophisticated heavy bomber ever
developed. Boasting a pressurized