Desperation Grows As Thousands Still Wait To Evacuate Kabul

White House acknowledges "volatile situation" after Biden claims there is "no indication" of Americans unable to get to airport. New photos show chaotic escape from Kabul in packed U.S. aircraft. Pentagon: U.S. helicopters evacuated Americans outside airport. Full FDA approval of Pfizer vaccine expected as early as Monday. Lines at Florida antibody treatment site, some so sick they cannot stand.

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