The MM-1 mobile mass spectrometer is the primary chemical warfare agent detector in the Fox reconnaissance vehicle. During Operation Desert Storm, the MM-1 monitored against a target list of up to 22 pre-selected chemical warfare agents most likely to be present, based on intelligence reports of the suspected chemical warfare agent threat. To speed the initial search, the sampling probe operates at 180ºC and the MM-1 looks for only four ion peaks of each detected chemical warfare agent and attempts to match the target list of chemicals against the pattern and ratio of these peaks. If an initial match is made with these four ion peaks at a pre-determined intensity and relationship, the MM-1 sounds an alarm. However, this first alarm does not confirm the presence of a chemical warfare agent, since there are many chemicals that have similar ion peaks and many combinations of chemicals that may yield ion patterns similar to those in the target list. Consequently, the MM-1 can falsely indicate the presence of dangerous chemical warfare agents. To more conclusively determine what chemical is present, the operator must lower the sampling probe temperature to 120ºC, reacquire a sample of the suspected substance, and run a spectrum analysis with the MM-1 against all the detection algorithms stored in the MM-1 chemical library. For more detailed analysis later, the complete ion spectrum of the suspected sample can be printed on a paper tape