9 Weapons detection systems, namely, portable walk-through units for use at gathering spaces for detecting weapons utilizing computer hardware and downloadable software systems; Weapons detection systems, namely, portable walk-through units for use at gathering spaces for detecting weapons utilizing computer hardware and downloadable software systems including artificial intelligence and machine learning; Weapons detection systems, namely, portable walk-through units for use at gathering spaces for detecting weapons utilizing multi-sensor fusion; Weapons detection systems, namely, portable walk-through units for use at gathering spaces for detecting weapons utilizing radar; Weapons detection systems, namely, portable walk-through units for use at gathering spaces for detecting weapons utilizing facial recognition technologies; Weapons detection system for use at public gathering spaces to prevent gun violence utilizing interpretation of reflected electromagnetic waves and a pattern recognition device; Weapons detection systems, namely, portable walk-through units for use at gathering spaces for detecting weapons utilizing computer hardware and downloadable software systems, artificial intelligence, machine learning, multi-sensor fusion, facial recognition, and interpretation of reflected electromagnetic waves and a pattern recognition device; threat detection surveillance and detection systems consisting of portable walk-through units for use at gathering spaces for detecting weapons and security threats combining sensor technology, machine learning, artificial intelligence, comprehensive analytics, and computer system comprised of computers and recorded software for analysis of artificial intelligence data