Protesters tried to interrupt the US Secretary of State John Kerry as he made the case for military action against Syria at a House of Representatives hearing.
Seated behind Kerry, some of the demonstrators held their hands, which were painted red, in the air as he spoke, whilst others had pink tape strapped across their mouths.
At one point, a man wearing a sign on his shirt saying "US out of Syria" stood up and walked past Kerry, holding up a small sign that read, "Killing poor people is patriotic"
Obama made a personal appeal to the international community to unite in military action against 'barbarism' in Syria.
President Obama has received the support of prominent Republicans as he tries to gain backing for military action in Syria.
President Obama and his team are engaged in frenzied lobbying as lawmakers prepare to vote on a possible military strike in Syria.