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(NECN/NBC News: Brian Mooar) - President Obama is weighing U.S. options.
"Obama, we need your help," chanted demonstrators calling on him to halt the bloodshed in Syria.
U.S. officials say there's now little doubt chemical weapons were used, leading President Obama to order plans for a possible military strike.
"We are prepared to exercise whatever option, if he decides to employ one of those options," said Defense Secretary Chuck Hagel.
As the White House spent the weekend lining up support from other world powers, Syria finally agreed to let U.N. inspectors see the attack site on Monday.
The area has been shelled for the past five days, likely destroying evidence
"I think we will respond in a surgical way," said Republican Sen. Bob Corker from Tennessee.
While some are calling for action, few want boots on the ground.
"Something that gets their attention, that causes them to understand that we are not going to put up with this kind of activity," said Corker.
The Navy has four destroyers in the Mediterranean with missiles ready to fire at President Obama's order.
Iran and Russia are warning the United States that unilateral action could have dire consequences.