After the Bush-Maliki Iraq Summit, Is Anyone in Control?

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After the summit in Jordan, President Bush appears to reject James Baker's Iraq Study Group even before its recommendations get to the White House. Prime Minister al-Maliki may be losing control of his government. Who's running Iraq?  What should the US do? Plus, traces of radiation discovered in a dozen sites during the investigation into the death of the late Russian spy, Alexander Litvinenko, and does immigration cause violence and crime, or make cities safer?