- Obama, Biden to visit Orlando on Thursday
- FBI has sent intelligence bulletins to gay nightclubs, but there are no imminent threats
(CNN)Federal investigators digging for clues in the Orlando nightclub massacre are zeroing in on Noor Salman, the widow of gunman Omar Mateen.
- Shooter's conflicting persona
- Did wife know about attack?
- The victims: 49 lives cut short
- Shootout caught on camera
- Graphics: U.S. leads mass shootings
- Nightclub attack: America's Bataclan?
- 'If you are alive, raise your hand'
- How the shooting unfolded
- How to help victims
- Obama confronts Trump on 'radical Islam'
- Muslim leaders: Extremists don't define us