March 1, 2018 3:59 pm Start-Ups Create Bulletproof Shelters for Classrooms With gun violence an ever-looming concern with school officials and parents, start-ups like Shelter in Place are starting to create and design bulletproof shelters as a way to keep children safe. US & World Videos 1:49 Finalists in math competition hope their model helps ease housing crisis 14:31 @Issue extra: Seth Moulton on pro-Palestinian protests, TikTok and more 2:31 Celtics preparing for pivotal Game 3 against Heat in Miami 1:17 Patriots player visits Franciscan Children's Hospital 5:54 Pro-Palestinian protest taking over college campuses