bracing for a u.s. strike, the bashar al assad regime weighing its options while president obama weighs his. how might syria respond? plus, the dictator's brother suspected of orchestrating a campaign of brutality. what we're learning about him. we want to welcome our viewers in the united states and around the world. i'm wolf blitzer. you're in "the situation room." president obama calls it a challenge to the world, but the u.s. commander in chief says he has not decided whether to launch a military strike against syria for its alleged chemical weapons attack on civilians. as the president huddled today with his national security team in the white house situation room, the administration has released details of a declassified u.s. intelligence report which says 1,429 people died in that august 21st horror including at least 426 children.