March 16, 2009 11:18 pm Crowd Builds for Presidential Visit People are waiting in line for tickets to an event featuring President Barack Obama. US & World Videos 1:57 Hazmat team responds after two people are found dead in Northridge 18:12 Police begin to clear protesters from USC campus 3:18 USC's commencement preparation includes increased security patrol 1:56 1 person killed after car crashes into South LA church 3:30 Protest on USC campus continues ahead of graduation