While ABCÂ’s Chris Cuomo played softball with Columbia University president Lee Bollinger on the upcoming speech of Iranian president Ahmadinejad, CNNÂ’s John Roberts directed tough questions to John Coatsworth, dean for ColumbiaÂ’s School of International and Public Affairs. Roberts opened the interview with a question which summarized AhmadinejadÂ’s record. "Here's a leader who's advocated the destruction of Israel, denied the Holocaust, and is accused by our government, the United States government, of supplying both fighters and equipment to insurgents in Iraq, to kill U.S. troops. Why would you ever want him on your campus?" Coatsworth appeared during the 7 am...