A rocket fired by Palestinian militants at southern Israel leaves a thin trail of white smoke, as smoke caused by explosions from Israeli forces' operations rises from buildings on the outskirts of Gaza City, Tuesday, Jan. 6, 2009. Israeli forces edged closer to Gaza's major population centers on Tuesday and attacked new targets, including a U.N. school, taking more civilian lives after ignoring mounting international calls for an immediate cease-fire. A Palestinian rocket attack wounded an Israeli infant.