March 19, 2015 5:30 pm Prosecutors Show Photos of Pressure Cooker Bombs in Tsarnaev Trial An FBI agent testifying in the Boston Marathon trial says shrapnel from the explosives the bombers hurled at police days after the 2013 attacks was found up to a block away. US & World Videos 2:03 Mass. school officials threaten to suspend student protesters 2:13 Karen Read trial Day 6: Witness testimony resumes 6:03 Tensions rise during campus protests at MIT and Harvard 6:19 Police surround pro-Palestinian encampment at MIT 5:12 Karen Read's defense pushes the question of credibility
