work weeks. we will see you at 4:00. world news tonight is next. tonight, the plane crash in texas, going up in flames. how did the passengers and crew survive? the flight from houston to boston crashing during takeoff, engulfed in flames. 21 passeners and crew onboard, including a 10-year-old child, escaping the flaming wreckage. surveillance showing the md-87 speeding down the runway just moments before. the major news coming in on boosters in this country. what the fda is now saying about mixing and matching when you get your booster. and in particular, if you got the one-shot johnson & johnson vaccine what a new study shows if you get a different booster what they saw in the antibodies. and news tonight on this new delta sub-variant fueling this new surge in the uk. and now seen in at least five states here in the u.s.