nt mechanical mishaps with Vose's old plane, and were held at gunpoint by Mexican drug smugglers when they landed on one of their rural airfields.
Both men live in West Texas now, where Vose, still a flying instructor at 82, operates a commercial flying service from Alpine, Texas, and uses radio telemetry to track bears and quail.
Tennant, 61 and an avid bicyclist, has written several award-winning books on wildlife and nature. When not lecturing on nature, he lives in Marathon, Texas, just north of Big Bend National Park.
His falcon tales have already captured the attention of the reading public, putting On the Wing onto best-seller lists. It may even reach the silver screen. The story has been optioned by Robert Redford to be made into a film, Aloft, for National Geographic Feature Films. Redford plans to play Vose.
Editing by Cynthia Osterman