HIV Scare Hits Porn Industry Adult film star Cameron Bay tested positive for HIV and temporarily halted porn production. Double Panda-monium! Zoo Atlanta's New Twins Meet the only surviving baby panda twins in the United States. Feed Frenzy: Ben Affleck as Batman? Twitter erupted when the news hit that the "Argo" director would play the superhero. Remote Area Medical: Serving the Underserved Part 1: "Nightline" spent time with the all-volunteer health care team in Wise County, Va. Mobile Free Clinic Helps Thousands in 72 Hours Part 2: Patient walked 15 miles to receive medical care, when doctors discover something. Feed Frenzy: Aaron Hernandez Charged with Murder Former Patriots tight end was indicted in the shooting death of his friend, Odin Lloyd. Did Syria Use Chemical Weapons on Its People? Syrian opposition claims hundreds have died in a chemical weapons attack in Damascus. Feed Frenzy: Women Who Stay Calm Under Fire When an alleged gunman entered a Georgia school, a woman helped defuse the situation. Elementary School Gunman Took Hostages, Police Say A 20-year-old is in custody after allegedly carrying an AK-47 inside a Georgia school. Egyptian PM: 'There Is a Lot of Misunderstanding' Prime Minister Hazem el-Beblawi told ABC News he does "not fear civil war." Feed Frenzy: Why Are We Pet Obsessed? We are going ga-ga for Sunny, the newest first pet at the White House. Baby George: First Look at Future King of England Photos of the newborn released, as Prince William talks about how fatherhood has changed him.