Company A recruits warm up for their two-mile ability group run with 30-pound ammunition cans aboard Marine Corps Recruit Depot San Diego May 10. Recruits run through various stations to perform exercises aimed at building their strength, agilty and endurance. - Company A recruits warm up for their two-mile ability group run with 30-pound ammunition cans aboard Marine Corps Recruit Depot San Diego May 10. Recruits run through various stations to perform exercises aimed at building their strength, agilty and endurance.