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to be hospitalized or die from rare breakthrough cases, even though some instances have occurred lester >> kelly o'donnell at the white house, thanks excitement building here on a friday morning in tokyo where just hours from now the opening ceremony of these olympics get underway. covid concerns scaling mentum tom llamas is here and has late details for us >> reporter: tonight the u.s. women's gymnastics team giving the world a glimpse of why they are favored to win gold. simone biles showing her power and grace during a run-through on the mat, and her poise just before nailing this vault the team staying united after that covid scare. alternate kara eaker still isolating after testing positive and in softball, team usa on the road to gold with back-to-back victories. on the field and in