WASHINGTON — Three days after an alleged, large-scale chemical-weapons attack in Syria, President Obama spent much of today meeting with his highest-level national-security and intelligence advisers, grappling with what to do if Syria has crossed the “red line” of chemical-weapons use.

The U.S. intelligence community is still gathering evidence about Wednesday’s attack in a suburb of Damascus that sent thousands to hospitals and left hundreds reported dead, the White House said.

h/t – abcnews