September 14, 2017 12:00 am ‘Backpack Full of Cash' Debuts in Boston Actor Matt Damon is lending his voice to a new documentary that addresses the national debate on public education. US & World Videos 1:54 Authorities looking for man accused of sexual assault in Cambridge 0:17 Child injured after being struck by car outside Saugus mall 2:23 Search for suspect after sexual assault reported in Cambridge 4:09 Budgets, staffing, and social media can all impact violence in schools, administrators say 2:35 Sumner Tunnel closed for weekend