The NATO summit in Washington kicked off with a strong emphasis on supporting Ukraine.

US President Joe Biden, in his opening speech, promised to send a fifth Patriot air defense system to Ukraine.

He highlighted NATO's strength, stating it's 'stronger than ever in history.

' Swedish Prime Minister Ulf Kristersson and his wife were seated prominently next to the US presidential couple, marking Sweden's first attendance as a NATO member.

Biden praised Sweden and Finland's recent membership as part of NATO's successes.

Ukrainian President Volodymyr Zelenskyy is also present at the summit, where discussions about Ukraine's potential NATO membership are expected.