WATCH: Zelenskyy and Biden White House meeting

Ukrainian President Volodymyr Zelenskyy made his way to Washington on Wednesday for a summit with President Joe Biden and an address to Congress in a bid to shore up support for his country and send a defiant message to its Russian invaders. Zelenskyy said on his Twitter account that the visit, his first known trip outside Ukraine since the war began in February, was “to strengthen resilience and defense capabilities” of Ukraine and to discuss cooperation with the United States. The highly sensitive trip was taking place after 10 months of a brutal war that has seen tens of thousands of casualties on both sides and devastation for Ukrainian civilians. The U.S. was set to announce its largest single delivery of arms to Ukraine, including Patriot surface-to-air missiles, and Congress planned to vote on a spending package that includes about $45 billion in emergency assistance to Ukraine. READ MORE: