Cornell rape allegation puts fraternities' long struggle with trust back in focus

The Cornell University gang rape allegation is the latest in a series of black marks for fraternities, leading critics to question why universities continue to support them.  
Fraternities, almost as old as the country itself, have been a staple at colleges for young men to come together with the stated goals of teaching leadership, community service and building friendships.  
But highly publicized incidents of sexual assault and hazing plague the groups, which could face a tough roa