November 10, 2014 5:46 pm Challenge Hero: Sgt. Nicole Narvaez Army National Guard Sgt. Nicole Narvaez is this week’s Challenge Hero. Broadcast Sunday Nov. 9, 2014 on NBC4. (Published Monday, Nov. 10, 2014) US & World Videos 2:42 Days before USC commencement, protesters still camped out on campus 0:34 Deadly crash damages church in South Los Angeles 1:42 Shooting investigation at DTLA warehouse 3:20 Encampment remains on USC 1:39 Bicyclist killed in hit-and-run