Janet Grammer decided in an instant: Thursday wasn't her day to die. So when a would-be robber burst into a Jacksonville convenience store shortly before 1 p.m. and fired two shots while demanding she clean out the cash register, the 64-year-old clerk and mother of 10 knew one thing. "I figured either I was going to have to pull the trigger or I'd be dead," said Grammer. So she did. Faking a moment's hesitation, Grammer reached under the counter for a .38 special and came up firing, her first shot hitting the man in the chest at point-blank range. The...