The New York state college whose invitation to CU professor Ward Churchill touched off a firestorm of controversy cancelled his talk this morning over security concerns. Hamilton College told the professor it is concerned that Clinton, N.Y., police might not be able to provide adequate security for the ethnic studies professor at the panel discussion scheduled Thursday because of the number of death threats made against him in response to his essay that argued the 9/11 attacks were justified and compared victims to Adolf Eichmann, the chief operative in Hitler's extermination of the Jews during World War II. "Considerable threats...