(Photo Mike Hensdill/The Gaston Gazette) On the second Saturday of each month recruits from several counties in the area converge on Poston Park on Lowell Spencer Mountain Road to take their IST (Initial Strength Test). Recruits must do at least 2 pull-ups, at least 44 crunches in two minutes and run a 1 1/2 mile course in under 13:30 for men and under 15:00 for women. Here, recruit Zack Milton puts in the effort to do several pull-ups as other recruits watch and wait their turn.