The Amtrak train that derailed in Philadelphia and a separate commuter train in the vicinity may have been hit by projectiles of some kind shortly before the wreck, a U.S. transportation safety official said on Friday, after investigators interviewed members of the Amtrak crew.
Former Texas Governor Rick Perry will announce whether he will mount a second bid for president in the November 2016 election at a Dallas event on June 4, an aide said on Friday.
U.S. President Barack Obama said in remarks broadcast on Friday that Washington would assist Gulf allies facing conventional military threat and also improve their ability to address concerns about destablising Iranian actions in region.
Boston Marathon bomber Dzhokhar Tsarnaev was sentenced to death by a U.S. jury on Friday for helping carry out the 2013 attack that killed three people and wounded 264 others in the crowds at the race's finish line.
