US judge dismisses discrimination suit by Texas 'clock boy'

A court in Texas has dismissed a lawsuit by the family of a Muslim teen who was invited to the White House by Barack Obama after having constructed a clock that police mistook for a bomb.Ahmed Mohamed, who was 14 at the time, became an internet sensation after being handcuffed and detained for hours for bringing his "invention" -- a circuit board wired to a digital display -- to school in the Texas city of Irving, near Dallas.Ahmed said he merely wanted to show his work to a new teacher to impre