LATHAM - Private First Class Harley Jellis spent Sunday morning’s drill testing the M-43 Protective Mask on the FIT Analyzer which tests the mask for air leaks. Sitting opposite Jellis and getting his mask tested is 1st Lt. Bryon Bullock. Both Soldiers are part of Headquarters and Headquarters Company, 42nd Combat Aviation Brigade. The FIT testing was part HHC’s annual maintenance checks on their mask inventory.