The role of race in the controversial arrest of Harvard professor Henry Louis Gates Jr. became more difficult to untangle Monday with the release of the tape of the emergency call that brought Cambridge, Mass., police to his door. The tape revealed that the woman who reported seeing two men trying to break into a house did not know their race. When pressed twice by the dispatcher to identify the men by race, Lucia Whalen said: "Um, well, there were two larger men. One looked kind of Hispanic, but I'm not really sure. And the other one entered and I...