A Marine who's planning to marry a Texan got an early Christmas present: A fellow shopper picked up the tab for a $3,000 diamond engagement ring after the two struck up a conversation in a jewelry store. The 54-year-old Dallas woman who paid for the 1-carat, princess cut diamond ring wants to remain anonymous, Helzberg Diamonds spokeswoman Stacey McBride told The Associated Press on Friday. The woman's father was in the military, her brother was a Marine who died in Vietnam and her nephew just got back from Iraq, McBride said. Marine James Lynaugh, 28, of Patuxent River, Md., was...