RASHIDIYEH CAMP: During Israel's 1982 invasion of Lebanon, Abu Shawqi was a 20-year-old "RPG kid," repeatedly firing the shoulder-launched rockets at Israeli tanks during the stiff Palestinian defense of the Rashidiyeh refugee camp. Now he sits in the shade of a fig tree on the edge of Rashidiyeh, preparing for the possibility of another Israeli assault on the camp if the Jewish state fulfills its stated intention to punch northward all the way to the Litani River. "It was a very tough battle in 1982. We were kids but we fought them hard," he said, looking relaxed in his olive...