Related by context. Frequent words. (Click for all words.) 72 Surveillance 64 surveillance cameras 52 monitoring 51 surveillance tapes 45 CCTV 45 CCTV cameras 45 eavesdropping 44 cameras 44 reconnaissance 43 patrols 43 wiretap 42 wiretaps 41 interdiction 41 thermal imaging 41 wiretapping 41 plainclothes officers 41 videotaping 41 vigilance 40 interrogations 40 radar 39 spy satellites 39 dragnet 39 interrogation 39 security 39 patrolling 38 undercover 38 Cameras 38 videotape 38 camera 38 fingerprinting 38 scanners 37 covert 37 counter terrorism 37 FBI agents 37 tracking 37 GPS tracking 36 imaging 36 enforcement 36 situational awareness 36 audio recordings 36 scanner 36 FBI 36 scanning 36 patrol 36 CCTV footage 36 detection 36 inspections 36 manhunt 36 snooping 36 footage 36 supervision 36 monitor 36 bugging 35 interrogating 35 law enforcement 35 antiterrorism 35 electronic warfare 35 counterterrorism 35 suspect 35 plain clothes 35 oversight 35 videotapes 35 spying 35 detain 35 eavesdrop 34 unmanned aircraft 34 body scanners 34 unmanned 34 video 34 Security 34 safeguards 34 facial recognition 34 apprehend 34 arrest 34 screening 34 X ray machines 34 unmanned aerial vehicles 34 massive manhunt 34 satellite imagery 34 monitored 34 lookouts 34 plainclothes 34 quarantine 34 airborne 33 homeland security 33 suspects 33 radars 33 inspection 33 remote sensing 33 voyeurism 33 videotaped 33 spy 33 snoop 33 intrusion detection 33 Foreign Intelligence Surveillance 33 sensors 33 countermeasures 33 detectors 32 surreptitiously 32 biometrics 32 night vision goggles