details come out about her life and her untimely death. America on the verge of a possible attack against syria. Overnight, u.N. Weapons inspectors left this country, meaning the u.S. Could launch a... See More
details come out about her life and her untimely death. America on the verge of a possible attack against syria. Overnight, u.N. Weapons inspectors left this country, meaning the u.S. Could launch a missile strike at any moment. We have team coverage of this crisis. Terry moran in beirut. Pierre thomas in washington. We're going to start with abc's jim avila at the white house. Good morning, jim. Reporter: Good morning, dan. The president has not decided which option to take. But the u.N. Weapons inspectors have left the country. And the window is now open for a u.S. Military strike on syria. A war-weary president meets with his national security council. Delivering the commander in chief strike options that are targeted, limited, no boots on the ground. We are looking at the possibility of a limited, narrow act. Reporter: The white house, opening the window for a military response. Delivering an intelligence report, based on medical personnel, satellites, social media videos and intercepts from syrian officials, that found 1,429 people killed in the chemical weapons attack. 426 of those, children. Instead of being tucked safely in their beds at home, we saw rows of children, dead from assad's gas. Reporter: The secretary of state calling syria's president a thug and murderer. This crime against humanity, this matters to us. Reporter: The intelligence report revealing new evidence. Syrian troops ordered to wear chemicals weapons gear before the rockets landed. Satellite tracking showing launches from assassad-controlled front lines into. And a barrage of conventional shells to side the evidence. When over 1,000 people are killed, including hundreds of innocent children, and there is no action, then, we're sending a signal that that international norm doesn't mean much. Reporter: There is still opposition to any kind of military attack in congress. In fact, republicans have asked for another briefing today. The white house says, it will oblige. Bianna? Jim, our thanks to you. Meantime, syria is believed to be preparations for a strike. Some reports say inmates have been moved to military targets to be used as human shields. Abc news chief foreign correspondent, terry moran, is in beirut, lebanon. Can you tell us what is expected to happen next, now that the u.N. Weapons inspectors are out of the country? Reporter: Good morning, bianna. That is a watershed in this crisis. That's seen as the opening of the window for the suspected u.S.-Led attack. And the whole region is in a fever of rumor mongering. Out of kuwait, reports the attack could come as early as tonight. Take that for what its worth. In syria, the country's on a war footing. Television stations, radio stations, broadcasting patriotic music and patriotic images all day long. The exodus continues, including reports of top military officials fleeing the country here in lebanon, getting out of the way of that suspected u.S. Attack. And continuing reports that the highways around damascus, crowded with heavy trucks laden with scud missiles, rockets, tanks, taking them off of the military bases. People wonder what will be left when the attack, if it comes. Dan? More fear in an already dangerous region. Terry, thank you.
This transcript has been automatically generated and may not be 100% accurate.