BOULDER, Colo. (AP) - April 18, 2007 - A University of Colorado student pleaded not guilty Wednesday to making comments that classmates deemed sympathetic toward the gunman blamed for killing 32 students and himself at Virginia Tech, authorities said. During a class discussion Tuesday of Monday's massacre at Virginia Tech, Max Karson "made comments about understanding how someone could kill 32 people," university police Cmdr. Brad Wiesley said. Several witnesses told investigators Karson, who turns 22 on Thursday, said he was "angry about all kinds of things from the fluorescent light bulbs to the unpainted walls, and it made him...