What was supposed to have been two days of high level talks between Secretary of State Hillary Clinton, Treasury Secretary Timothy Geithner, and Chinese leaders has turned into a diplomatic fiasco over the fate of one man. CBS News correspondent David Martin reports that, at first, it was all smiles and hugs. Chen Guancheng couldn't thank American diplomats enough. He even phoned Secretary Clinton to personally thank her. For their part, the Americans seemed delighted to have ended a standoff that began six days ago when Chen escaped from house arrest and took refuge in the U.S. embassy. Then, as...