July 12, 2016 8:10 pm Charles River Swimming Proposed A nonprofit group says parts of the Charles River is clean enough for a permanent swimming area. US & World Videos 3:13 Weather forecast: Clear and sunny, with temps in the 70s 1:29 Sumner Tunnel in Boston to close for one month 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