Moment air raid sirens blare as Biden visits Kyiv
STORY: Footage showed the leaders leaving the Cathedral amidst the sound of the siren. There were no reports of Russian missile or air strikes.
The air raid sirens began while Zelenskiy and Biden were inside the St Michael's Golden-Domed Cathedral on a square in central Kyiv where burnt-out Russian tanks have been placed.
Biden said Washington would stand with Ukraine as long as it takes.