2 National Guard soldiers, Border Patrol agent killed in Texas helicopter crash

An investigation is underway into what caused the crash of a National Guard helicopter in Texas that killed one Border Patrol agent and two soldiers on board. A third soldier was seriously injured in the crash. NBC News’ Priscilla Thompson reports. » Subscribe to NBC News: NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features , , , Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! Breaking News Alerts: Visit : Find NBC News on Facebook: Follow NBC News on Twitter: Get more of NBC News delivered to your inbox: #NationalGuard #Helicopter #Texas