Ever since the 9/11 attacks, governments around the world have realized the need for more diligent and robust security systems. The most surprising aspect of the 9/11 attacks was the fact that it was well coordinated and also that the required explosives and weapons had passed through the then advanced security systems at the airport. Following the attacks, it was necessary for governments around the world to improve their law enforcement agencies in all aspects. This included law enforcement agencies on land as well as at all ports of embarkation. Airport security was one of the ports which was at the top of every government agency list to improve upon. Screening technologies such as Covert Walk-by Biometric Identification Corridors, Focal Plane Array Passive MMWave, Fused Standoff Video Surveillance and Biometrics, Passive Electro Magnetic Signature Corridor, Walk-by Active Electromagnetic Weapons Detection Corridors, Walk-by Fourier Transform Infrared (FTIR) Spectroscopy ...