PBS NewsHour: In Syria, 'Whac-A-Mole' Revolution Turns Increasingly Bloody

As dozens more died Monday in Syria amid heavy fighting, U.N. special envoy Kofi Annan said he was "gravely concerned," citing reports of continued shelling in Homs. Gwen Ifill discusses the prospects for civil war with Andrew Tabler of the Washington Institute for Near East Policy and Mona Yacoubian of the Stimson Center.

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