The Mercer County Sheriff's Department's SWAT team and the Princeton Police Department's SWAT Team join forces for a four day training session. Saturday's training took place at Pikeview Middle School.  Dave " Boon", who instructed the event, was one of four contractors who held the line in Benghazi when all odds were against them.  Boon also had served previously in the Marine Corps and as a deputy sheriff.  Currently Boon is teaching tactics and shooting to SWAT teams and civilians all over the country.