The Campbell/Harris Security Equipment Company (CSECO - http://www.cseco.com) has been manufacturing and supplying contraband detectors to US Customs and Border Patrol agents, state and local law enforcement, for over 25 years. Here they locate hidden drugs on the Mexican border using the Buster and Fiberscope. The agents are able to look into the gas tank and notice some tampering. Upon further inspection, the agents locate drugs which have been hidden in the gas tank in a separate container. Learn more about CSECO's products, like the Buster and Fiberscopes, by visiting http://www.cseco.com/Products.aspx.