Arthur Leo Zagat 
When the Sleepers Woke [PDF ebook] 

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 back-ranging of its squadron of a thousand helicopter planes. The cones bristled oceanward from the sea-margin of New York, their points a fifty-mile arc of defiance, their bases tangent to one another, almost touching the ground at their lower edges, then circling upward for ten thousand feet. From van to rear each formation was five miles in length.