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

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?