Why Putin's long-feared attack on Ukraine will rock America and the world

Just as diplomats at a last-minute United Nations Security Council meeting were pleading for peace, Russian fire began raining down on Ukraine.

On a haunting night, marked by an address from Ukrainian President Volodymyr Zelensky that felt like a eulogy for a democracy, decades of peace between nations on the European landmass ended with loud blasts in multiple Ukrainian cities. Within hours, livestream video showed a column of military vehicles streaming into the country from Belarus, where Russian troops had been massed. And thunderous explosions soon boomed over the capital Kyiv, as air raid sirens wailed, heralding a dangerous new crisis for a world already rocked by turmoil.