Related by context. Frequent words. (Click for all words.) 58 reconnaissance 57 surveillance 54 reconnaissance missions 54 unmanned aerial vehicles 53 unmanned surveillance 53 unmanned drones 53 satellite imagery 52 patrols 52 patrolling 52 unmanned aircraft 50 UAVs 50 helicopters 49 interdiction 49 aerial surveys 49 thermal imaging 48 infrared cameras 48 aerial 48 spy satellites 47 remote sensing 47 aerial photography 47 unmanned aerial vehicle 47 unmanned 46 overflights 46 UAV 45 drones 45 aerial photographs 45 Global Hawk 44 counternarcotics 44 reconnaissance aircraft 44 monitoring 44 Predator drones 43 drone aircraft 43 helicopter 42 LIDAR 42 patrol 41 infrared camera 41 covert 40 sorties 40 radars 40 sniffer dogs 40 night vision goggles 40 drone 40 sonar 40 thermal imaging cameras 39 drug interdiction 39 gunships 39 saturation patrols 39 radar 39 situational awareness 39 Patrols 39 ground penetrating radar 39 incursions 39 choppers 39 warplanes 38 patrolled 38 Patrolling 38 cloud seeding 38 geophysical survey 38 Border Patrol 38 counter terrorism 38 airlifts 38 flyovers 38 Aerial 38 cadaver dogs 37 counter narcotics 37 satellites 37 surveillance cameras 37 troop movements 37 airborne 37 mapping 37 electronic warfare 37 paramilitary forces 37 infrared 37 spotters 37 Helicopters 37 drug smugglers 37 sharpshooters 37 aerial spraying 37 helicopter gunships 37 fighter jets 37 Border Patrol agents 36 aircrews 36 eradication 36 inspections 36 binoculars 36 Doppler radar 36 AWACS 36 counterterrorism 36 aircrafts 35 Reconnaissance 35 Surveillance 35 Predator drone 35 recon 35 infrared sensors 35 aircraft 35 Unmanned 35 planes 35 nonlethal 35 FLIR 35 seismic surveys 35 geophysical surveys