Scientists detected the gravitational waves after a pair of unusual black holes collided.
Note: This interview occurred in the 12 o’clock hour, before the speech by Secretary of State John Kerry.
President Barack Obama says military action against Syria would be “a shot across the bow” to stop Syria and others from using chemical weapons again.
But many current and former U.S. military officers are skeptical about any operation.
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.