Boston April 20, 2018 12:18 pm Students Walking Out to Protest Gun Violence Students are walking out to protest gun violence in schools on the 19th anniversary of the Columbine High School shootings. US & World Videos 2:03 Mass. school officials threaten to suspend student protesters 2:13 Karen Read trial Day 6: Witness testimony resumes 4:02 ‘To Catch a Contractor' series leading to changes 1:02 20% of nurses to leave field within 2 years 6:03 Tensions rise during campus protests at MIT and Harvard