Summary: The U.S. and China continue to negotiate over activist Chen Guangcheng's travel to America. Plus, President Obama visited Afghanistan on the one year anniversary of Osama bin Laden's death. Also, new unemployment numbers and the 2012 presidential race. Joining Gwen: Martha Raddatz, ABC News; Peter Baker, New York Times; David Wessel, Wall Street Journal; Charles Babington, Associated Press.
