U.S. President Barack Obama and his top foreign policy advisers are expected to meet on Friday to consider their military and other options in Syria as Syrian and Russian aircraft continue to pummel Aleppo and other targets, U.S. officials said. Some top officials argue the United States must act more forcefully in Syria or risk losing what influence it still has over moderate rebels and its Arab, Kurdish and Turkish allies in the fight against Islamic State, the officials told Reuters. One set of options includes direct U.S. military action such as air strikes on Syrian military bases, munitions depots...