Reporter December 11, 2018 11:36 pm The Investigators: Valley of Regret A former manager at Columbia Gas says he warned of trouble three months prior to the explosions in the Merrimack Valley in September. US & World Videos 2:52 Severe weather kills at least 5 as tornadoes rip through Midwest and South 8:39 Gina Rodriguez gushes 0ver motherhood with son Charlie 2:22 Scarlett Johansson and Colin Jost have date night at White House Correspondents' dinner 2:09 President of MIT calls for shutting down pro-Palestinian encampments 3:57 Pleasant Sunday despite morning showers