President Donald Trump's special envoy to Ukraine and Russia visited Kyiv to meet with top Ukrainian officials. This visit came amid strong accusations exchanged between Trump and Ukrainian President Volodymyr Zelenskyy over the war.

The Transportation Department revoked its approval for New York City's congestion toll, which charges drivers entering Manhattan below 60th Street. New York Gov. Kathy Hochul stated she would fight the termination, and the Metropolitan Transportation Authority filed a lawsuit challenging the move.

A federal judge held a hearing with New York City Mayor Eric Adams and federal prosecutors regarding the mayor's criminal charges. The judge stated he would rule on a government request to drop the charges against the mayor.

The polar vortex reached its peak across much of the United States, with millions facing record-breaking cold and heavy snow. The average low temperature in the continental United States was just 13.7 degrees.

Two people were killed when two small, single-engine aircraft collided mid-air near Tucson, Arizona. Two people were aboard each aircraft. An investigation is underway.