He has searched Belgium for Americans shot down in the Battle of the bulge.
Targeting pods can bulge out a bit, and leak out unwanted signals.
My father, a veteran of the Battle of the bulge, and my mother, an American Red Cross girl, were married in Berlin in March 1947.
"to protrude, swell out," 1670s, from bulge (n.). Related: Bulged; bulging.