M I T I n t e r n a t i o n a l C e n t e r f o r A i r T r a n s p o r t a t i o n M I T I n t e r n a t i o n a l C e n t e r f o r A i r T r a n s p o r t a t i o n MITMITICATICATBarriers to Routine UAV Operation in the National Aerospace System Roland E. Weibel and R. John Hansman Massachusetts Institute of Technology 4 April 2003 Altus II Aircr aft, 1998 – Dryden Photo Collec tion