But he said he believes the United States should be much more involved in arming, training and providing intelligence to rebels to ensure that the rebels are acting in a proper way and not working to closely with extremist groups such as al-Nusra.
Rogers suggested the prospect of arming the rebels could be a matter of discussion at the upcoming Friends of Syria meeting next week in Morocco, which Secretary of State Hillary Clinton is attending. This sentiment was echoed by other diplomats at the conference.
Mustapha Sabbagh, one of the leaders of of the new Syrian opposition coalition, said that procrastination and reluctance of the international community to get involved militarily has led to further militarization and radicalization of the conflict. He urged the world to do more.
Sabbagh called on Russia and Iran to stop supporting the 'killing machine' of al-Assad's government.
"I would be very embarrassed for Russia when the file is opened about their involvement in Syria," he told the delegates.