Store Clerk, 64, Sorry She Had To Shoot Robber POSTED: 7:04 am EDT April 15, 2005 UPDATED: 11:31 am EDT April 15, 2005 JACKSONVILLE, Fla. -- A hooded gunman may have thought the older, female clerk would be an easy mark as he entered a convenience store, weapon blazing and demanding money. But he wasn't counting on Janet Grammer, who was filling in for the regular clerk. The 64-year-old mother of 10 and former security guard pulled a gun from under the cash register and began shooting, hitting the would-be robber in the chest. "I think he thought I was...