August 10, 2017 7:30 pm Wood Construction Causes Concern With a 10-alarm fire in Waltham, Massachusetts, being determined to have been intentionally set, the NBC Boston Investigators are looking into construction materials that may cause flames to spread even faster. US & World Videos 1:04 Hunter Biden plans to sue Fox News 23:59 Teen (Girl) Talk with Chelsey Goodan 1:40 Charlie Puth reacts to Taylor Swift's ‘The Tortured Poets Department' name-drop 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