Israel again expanded the scope of its offensive against Palestinian towns and refugee camps today, sending thousands of troops and more than 150 tanks and armored vehicles into the West Bank city of Ramallah and an adjacent camp. The assault, coming on the heels of a similar attack overnight in the Gaza Strip, touched off day-long gun battles, deepening the sense of open-ended conflict here 48 hours before the scheduled return of a U.S. peace envoy. Full Story