Illegal Drug Detection The major security problem with the U.S.A. / Mexican border is the use of illegal drugs by Americans; our thrust for these chemicals and our willingness to pay big bucks for each entices those that make, distribute, and sell to illegally cross the border when possible. The BorderTransportationSystem is designed to make it very difficult to illegally cross from Mexico to the U.S.A. with illegal drugs, either at a legal crossing or out in the desert nowhere. The 'T' design of the route along with the traffic lanes for vehicles and rail make it very unsafe to cross on foot, and the sensor systems make it nearly impossible to tunnel under or fly over the route. Index of ... DetectaChem portable detection Drug test Matrix Assisted Laser Desorption Ionisation Mass Spectrometry Imaging Signal and Sensor Systems