Bill Nye @TheScienceGuy & @LevarBurton welcome you to the #WHScienceFair! https://t.co/wKoIjJqklh— The White House
17-year-old Easton introduces his 3D printed robotic arm. #WHScienceFair https://t.co/6MC6BDJKMx— The White House
- Dylann Roof has been formally charged with nine counts of murder for the Charleston church shooting last month.
- Britain marks 10 years since 52 people were killed in terrorist attacks in London.
- Harry Shearer, the voice of Mr. Burns on "The Simpsons," will rejoin the show. In May, he said he was leaving.