Spies that Fly is a NOVA episode that originally aired in January 2003. This page of the television broadcast's online companion provides a fascinating historical account of unmanned aerial vehicles (UAV's). It will probably come as a surprise that the earliest UAV listed on this site was flown over four decades before the first manned airplane took off. From their modest beginnings, UAV's have evolved into extremely high tech instruments; the six-inch Black Widow UAV is one of the most extraordinary items described online. The Web site also shows some of the records for UAV technology.