"Prepare for battle!" The command crackled in Allan Dane's helmet. "Enemy approaching from southeast! Squadron commanders execute plan two!" Allan settled back in the seat of his one-man helicopter, his broad frame rendered even bulkier by the leather suit that incased it. He was tensed, but quiescent. Action would be first joined sixty miles away, and his own squadron was in reserve. Over New York and its bay the American air fleet was in motion. Suddenly movement ceased, and the formation froze. Ten flying forts were each the apex of a far-spread cone, axis horizontal, whose body was the fanned.