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A fire damaged building following a blast at around 4am during Russian artillery strikes in Kyiv, Ukraine, on Friday, Feb. 25, 2022. Ukraines president said Moscow-led forces were continuing attacks on military and civilian targets on the second day of their invasion after the U.S. and its allies imposed new sanctions on Moscow and U.S. President Joe Biden warned of "a dangerous moment for all of Europe." Photographer: Erin Trieb/Bloomberg via Getty Images

A fire damaged building following a blast at around 4am during Russian artillery strikes in Kyiv, Ukraine, on Friday, Feb. 25, 2022. Ukraines president said Moscow-led forces were continuing attacks on military and civilian targets on the second day of their invasion after the U.S. and its allies imposed new sanctions on Moscow and U.S. President Joe Biden warned of "a dangerous moment for all of Europe." Photographer: Erin Trieb/Bloomberg via Getty Images

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A policeman outside a fire damaged building following a blast at around 4am during Russian artillery strikes in Kyiv, Ukraine, on Friday, Feb. 25, 2022. Ukraines president said Moscow-led forces were continuing attacks on military and civilian targets on the second day of their invasion after the U.S. and its allies imposed new sanctions on Moscow and U.S. President Joe Biden warned of "a dangerous moment for all of Europe." Photographer: Erin Trieb/Bloomberg via Getty Images

A policeman outside a fire damaged building following a blast at around 4am during Russian artillery strikes in Kyiv, Ukraine, on Friday, Feb. 25, 2022. Ukraines president said Moscow-led forces were continuing attacks on military and civilian targets on the second day of their invasion after the U.S. and its allies imposed new sanctions on Moscow and U.S. President Joe Biden warned of "a dangerous moment for all of Europe." Photographer: Erin Trieb/Bloomberg via Getty Images

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A fire damaged building following a blast at around 4am during Russian artillery strikes in Kyiv, Ukraine, on Friday, Feb. 25, 2022. Ukraines president said Moscow-led forces were continuing attacks on military and civilian targets on the second day of their invasion after the U.S. and its allies imposed new sanctions on Moscow and U.S. President Joe Biden warned of "a dangerous moment for all of Europe." Photographer: Erin Trieb/Bloomberg via Getty Images

A fire damaged building following a blast at around 4am during Russian artillery strikes in Kyiv, Ukraine, on Friday, Feb. 25, 2022. Ukraines president said Moscow-led forces were continuing attacks on military and civilian targets on the second day of their invasion after the U.S. and its allies imposed new sanctions on Moscow and U.S. President Joe Biden warned of "a dangerous moment for all of Europe." Photographer: Erin Trieb/Bloomberg via Getty Images