Annan on Syria: Is the problem the plan, or implementation?

ROUGH CUT - NO REPORTER NARRATION

STORY: U.N. peace envoy Kofi Annan meets U.S. Secretary of State Hillary Clinton at the State Department to discuss Syria. "Is the problem the plan or is the problem the implementation?" Annan says.

The meeting comes after United Nations monitors entered the Syrian hamlet of Mazraat al-Qubeir on Friday, where opposition activists say at least 78 people were massacred, a U.N. source said.

Some 300 U.N. observers are in Syria to monitor a ceasefire between President Bashar al-Assad's forces and rebels that was declared by envoy Kofi Annan on April 12 but never implemented.