A Leominster, Massachusetts, man is facing charges after he allegedly tried to open an emergency exit door while aboard a United Airlines flight from Los Angeles to Boston Sunday and then allegedly stabbed a flight attendant in the neck, according to the U.S. Attorney’s office. Subscribe to WCVB on YouTube now for more: http://bit.ly/1e8lAMZ Get more Boston news: http://www.wcvb.com Like us: https://www.facebook.com/wcvb5 Follow us: https://twitter.com/WCVB Instagram: https://www.instagram.com/wcvb5/