An unhinged Florida man horrifically pummeled a deaf and nonverbal passenger while he was sleeping until the cabin was spattered with blood on a cross-country United Airlines flight this week. The brutal beatdown happened about two hours into United Airlines Flight 2247 from San Francisco to Washington Dulles on Monday. It started when Everett Chad Nelson, 44, got up to use the bathroom, according to a criminal complaint. While returning to his seat, Nelson stopped at seat 12F and “without notice, began physically attacking a sleeping male passenger by punching him repeatedly in the face and head until blood was...