Not many men in the military are eager to join a brand-new unit, where they don't know people, don't know what they'll be doing and don't have a proud unit lineage. But the Navy assured the men it would be good for their careers. So some men volunteered and a lot more were drafted to join Observation Squadron 67, so named because that was the year it was born. After a while the men took to calling themselves "the Ghost Squadron" because they felt forgotten, participants in a secret war that neither the U.S. nor the North Vietnamese wanted to...