Only a handful of those exemptions have been granted since the first was awarded to energy giant BP and UAV manufacturer AeroVironment in June for aerial surveys in Alaska . One major challenges is how to keep the small aircraft away from larger aircraft . There have been some close calls where hundreds of commercial aircraft came within range of UAVs .
One major challenges is how to keep the small aircraft away from larger aircraft . There have been some close calls where hundreds of commercial aircraft came within range of UAVs .