In the craggy Yugoslav villages, where for three years the sound of aircraft had been a sign as dread as the shadow of a hawk's wing across a henyard, villagers looked up at first in fear. Then they rushed out and cheered: the big formations of heavy bombers drumming overhead in stately alignment were U.S. planes outward bound from their bases in Italy.
Tough Partisan soldiers could well toss their red-starred caps into the air and cheer for the white-starred bombers of Major General Nathan F. ("Nate") Twining's Fifteenth U.S. Air Force. The far-ranging Fortresses and Liberators were hitting within...