Scientists detected the gravitational waves after a pair of unusual black holes collided.
Today members of the House of Representatives begin debating several measures that would limit President Obama’s options in Libya.
One option would mirror a proposal from Senators John Kerry and John McCain, who are calling for a one-year authorization of U.S. participation in the NATO-led airstrike campaign in Libya.
Another measure would end most U.S. involvement, except for non-combat roles.
Robin Young and Jeremy Hobson are hitting the road. Our Tumblr brings you behind the scenes of our election coverage.