1. 1USDepartmentofDefense,UnmannedAerialVehiclesRoadmap2002-2027,December2002, http://www.acq.osd.mil/usd/uav_roadmap.pdf
2. 2CharlesL.BarryandElihuZimet,UCAVsTechnological,Policy,andOperationalChallenges, DefenseHorizons,October2001,Number3,CenterforTechnologyandNationalSecurityPolicy, National DefenseUniversity.