An unmanned Army surveillance blimp floats through the air while dragging a tether line just south of Millville, Pa., Wednesday, Oct. 28, 2015. The bulbous, 240-foot helium-filled blimp came down near Muncy, a small town about 80 miles north of Harrisburg. The North American Aerospace Defense Command in Colorado said the blimp detached from its station at the military's Aberdeen Proving Ground in Maryland.  (Jimmy May/Bloomsburg Press Enterprise via AP)

Blimp on the loose: What does it do?

WASHINGTON (AP) — The U.S. military has begun efforts to remove an Army radar blimp from the woods in northeast Pennsylvania, where the high…