Rodney A. Jones had a clear plan for his life: He was going to join the Army, go to college, then become a politician. "He was going to be president one day," said Jones' sister, Felicia Devine. "He told me when he was like 16. I believe, really believe, that he would have been. He was just that smart and intelligent." Jones, 21, of Philadelphia, died Sept. 30 in a suicide bombing in Baghdad. He was stationed at Fort Hood, Texas. Jones read voraciously and graduated high school at 16. He wrote poetry and listened to classical music. "He was very analytical and very intelligent," Devine said. "A lot of people thought he was really old for his age." Devine said that when her brother learned he was going to Iraq, he started trolling the Internet to pick up some of the language. It paid off: When Jones returned home for a one-week break, he struck up a conversation in Arabic at a fast-food restaurant. He is survived by his mother,...