The US president wrapped up a three-day meeting for the Group of Seven nations on Sunday and after a tea with Queen Elizabeth II flew to Brussels for the NATO meeting scheduled to begin Monday.
Biden says that a strong NATO partnership is vital for maintaining US national security for the “remainder of the century.”
Cyber defence and climate change are among the topics being discussed at the summit.
Biden will also meet Tuesday with European Union leaders as well as visit Belgian King Phillipe. The president will finish the eight-day trip Wednesday by meeting in Geneva with Russian President Vladimir Putin.