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U.S., allies set to "challenge" Assad to end siege

Hillary Clinton meets with British Home Secretary Theresa May at the London Conference on Somalia
U.S. Secretary of State Hillary Clinton meets with British Home Secretary Theresa May at the London Conference on Somalia, Feb. 23, 2012. AP

The Obama administration, under renewed pressure to help end the violence in Syria, is working with allies on a united, international "challenge" to the Assad regime, demanding that Syria stop the siege on the central city of Homs within days and allow immediate medical and humanitarian aid to flow directly to aid agencies trying to help the city's battered civilians.

Secretary of State Hillary Rodham Clinton and other leading Arab and European diplomats - a group calling itself the "Friends of Syria" - met Thursday in London, on the sidelines of a conference on security in Somalia, to work on plans to get humanitarian aid into Syria.

"The efforts that we are undertaking with the international community ... are intended to demonstrate the Assad regime's deepening isolation," Clinton told reporters later Thursday. "Our immediate focus is on increasing the pressure. We have got to find ways of getting food, medicine and other humanitarian assistance. Into affected areas. This takes time and it takes a lot of diplomacy."

According to a senior U.S. official, the group will "challenge the Assad regime to respond within days."

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With more than 70 countries sending representatives to Tunisia on Friday for a hastily-assembled Friends of Syria meeting, Secretary Clinton is working on the details of what the Tunis conference should accomplish.

According to diplomats from the U.S. and other countries with knowledge of the talks, the Tunis wish-list is shaping up roughly like this:

1. A demand that Assad order a ceasefire in the attack on Homs and other cities and allow access for humanitarian aid to flow. The aid would be channeled to relief agencies already in Syria, supervised by the United Nations.

2. Increased recognition of the Syrian National Council - a Turkey-based organization claiming to speak for 60 Syrian dissident groups - as the leading political alternative to the Assad regime. The nod to the SNC would fall short of formal recognition, but the U.S. is behind an Arab League effort to give the SNC more international credibility. (It's worth noting the Arab League's transition plan for Syria already calls for Assad to step aside peacefully.)

3. Renewed efforts to have Arab states enforce ongoing, but often ignored economic sanctions against the Assad regime.

Left conspicuously off the wish list is the question of what happens if Assad refuses to bend to the group's demands. In the wake of the Russian and Chinese vetoes of a U.N. Security Council resolution condemning the violence in Syria and calling for Assad to leave, the U.S. is hoping the Tunis conference will serves as a new, united, international voice of outrage.

But that's only a hope.

What about arming the rebels? The U.S. is encouraging back-channel, unofficial discussions of how to send arms to rebel forces, but is reluctant to openly endorse an arms plan because it's unclear where those arms would end up if Syria descends further into civil war.

White House spokesman Jay Carney told reporters Thursday that while the administration opposes a military solution, "we'll have to evaluate this as time goes on."

This story was filed by CBS News correspondent Wyatt Andrews, traveling with the Secretary of State in London
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