newsmatt / AP correspondent Matt Small reports the president is calling a possible chemical weapons attack in Syria a "big event of grave concern."

View our embed guidelines

This site uses Javascript

Please enable it in your browser's preferences.

You can visit our support center if you're having problems.

Sorry, your browser isn't supported.

We recommend upgrading to the latest Chrome, Firefox, Safari, or Edge.

You can visit our support center if you're having problems.