September 11, 2019 6:00 pm United and Southwest to Allow Passengers to Opt-Out of Boeing 737 MAX Flights After two separate crashes involving the Boeing 737 MAX, two airlines are offering passengers the option of flying on another plane if the so choose. US & World Videos 2:07 Campus tensions continue to escalate in Boston 38:12 Prosecution's opening statement in the Karen Read trial | FULL VIDEO 3:30 Opening statements underway in the Karen Read trial 2:08 Tension grows over campus protests in Boston 2:31 Fallen Billerica Police Sgt. Ian Taylor honored at vigil