GOP-led House votes to sue Obama in first-of-its-kind lawsuit

Shootings In Cambridge, Watertown

Massachusetts Institute of TechnologySports
Metro SWAT members hang off the back of a truck as they prepare to search the School and Walnut Street neighborhood for one remaining suspect on April 19, 2013 in Watertown, Massachusetts. Earlier, a Massachusetts Institute of Technology campus police officer was shot and killed at the school's... Darren McCollester / Getty Images