The Chemistry Section also provides region wide forensic support to the St. Louis Regional Bomb and Arson Unit. Using instrumentation such as GC/MS, FTIR, LC/MS, IC/MS, XRD, and Stereomicroscopy forensic chemists are able to conduct analysis on explosives evidence to identify the presence of explosives or explosive precursors. These may include Black Powder, Black Powder Substitutes, Smokeless Powders, Improvised explosive mixtures, and many other classes of explosives. These analyses can help the Bomb and Arson Detectives determine the type of explosives used, connect a person to an explosives crime, or determine the presence of a clandestine explosives laboratory or manufacturing process. Chemists can also provide technical assistance to Bomb Technicians as they identify, process, and dispose of explosive threats.