Hinting at a military response, Secretary of State John Kerry on Monday accused Syria of using chemical weapons against its people, and said President Barack Obama believes “there must be accountability.”
President Obama's bus tour is overshadowed by growing problems in Syria and Egypt.
Secretary of State Kerry heads to Russia to talk to Russian President Vladimir Putin about Syria.
Lawmakers continue to consider various options for the United States in Syria.
Defense Secretary Chuck Hagel said Thursday that the U.S. intelligence community has determined that chemical weapons have been used on a small-scale in Syria.
The Syrian military is prepared to use chemical weapons against its own people and is awaiting final orders from President Bashar Assad, U.S. officials told NBC News on Wednesday.