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rifle from 18 to 21? the answer -- no. also tonight, the arrest. authorities capturing an armed man allegedly threatening to kill supreme court justice brett kavanaugh. authorities on what they say he had with him. breaking as we come on the air, reports of a deadly military crash. martha raddatz with late reporting. the pandemic, and tonight, the major news on the next booster shot. moderna now saying tonight its new booster is up to eight times more effective against omicron. the prime time hearings live tomorrow night before the nation. nearly a year of investigating the j...

Slightly less protective against the latest omicron subvariants, ba.4 and 5. >> we just don't quite know what the next variant is around the corner. we have a now the ba.4 and 5 variants that are increasing. we expect that this booster will provide some protection against future omicron sub variants, but we still don't know. >> reporter: there are still 4,000 americans with covid going into hospitals every day, and deaths are expected to climb in the coming weeks. experts stress if you're due for a booster, you shouldn't wait for the new vaccine. >> the better, you know, strategy, is to make s...

And a number you can text right on your phone to learn where boosters are available in your own community. we'll have that number for you tonight. also this evening, how effective will the vaccines be against this new variant? and why have we heard seemingly different messages from pfizer and mow der that? tonight, we're inside in moderna facility where they are working on a vaccine to take direct aim at that new variant if needed. martha raddatz is there live tonight. new reporting at this hour after the deadly high school shooting in michigan. the prosecutor revealing new details, how th...