STOCKTON — For some, the hardest part was jumping over a 5½-foot wall.The biggest challenge for others was lugging the deadweight of a sand-filled dummy more than 30 feet.And for the rest, it was simply having enough energy in reserve to complete the closing 500-yard run.Many men and more than a few women, some young and some getting up there in years, turned out Saturday at Chavez High School to take physical agility and written tests, the first steps [...]