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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. ....
reporter: last year, nationwide, 62% of all officer deaths in the line of duty were from covid. so, let s bring in matt gutman tonight. i wanted to get to this other headline. scientists are now tracking what they call a delta sub variant, a related strain in the uk, where cases are rising. there are reports tonight it s been found in the u.s., too. what do we know so far? reporter: david, this is one of those so-called delta-plus variants. it hass be been detected in the. it s about 6% of all cases in the uk. you mentioned it is here in the u.s. and it s of such concern that one of the former heads of the fda, scott gottlieb, wrote today, we need urgent research to figure out if this delta-plus is more transmissible. david? matt, thank you. we turn next here this evening to china. that country denying reports tonight that they have tested a nuclear-capable hypersonic missile. how would you track it if it was carrying a nuclear weapon? ....
Of them children, have been kidnapped. what we re now learning. marcus moore on the ground in haiti. the battle over mandates tonight. parents pushing back. and this evening, what they say when asked if they got their children other vaccinations when they were young. and news tonight on the virus. where they re seeing a delta sub variant. why authorities say it requires urgent research. overseas tonight, china denying it has tested a new supersonic missile, reportedly flying five times the speed of sound. how would you track it if it was carrying a nuclear weapon? and was u.s. intelligence caught offguard? jury selection under way tonight in the murder of ahmaud arbery. three white men, including a father and son, accused of killing arbery. and now the key video that will be at the center of this trial. the abc news exclusive. the former british spy behind the infamous steele dossier. investigating possible linked between then candidate donald trump and russia. ....