The document describes the GE VaporTracer, a handheld device that can detect microscopic traces of explosives and narcotics in seconds using ion trap mobility spectrometer (ITMS) technology. It was developed with support from the U.S. Counter-Drug Technology Development Program to help agencies like Customs and Border Protection. The VaporTracer can perform both particle and vapor sampling for flexibility and has applications in places like airports, government buildings, and prisons.