NATO has taken over air defenses in Poland from the US just days before the inauguration of President-elect Donald Trump, according to a NATO spokesman, with questions looming about the incoming administration’s approach to the alliance and to Ukraine.

U.S. Defense Secretary Lloyd Austin answered a plea from Ukrainian President Volodymyr Zelensky for more help to keep Russian warplanes away from its cities and borders with a $500 million package of fresh military aid.

U.S. Defense Secretary Lloyd Austin announced a new $500 million security assistance package for Ukraine in the waning days of the Biden administration.