KEY POINTS
  • Three pressing threats loom large over the summit, requiring the alliance to figure out its response and whether military intervention would be needed.
  • That includes mistaken fire on an allied nation, cyber attacks on a NATO member state and the possibility of chemical or biological warfare within Ukraine. 
  • NATO leaders are also expected to announce more humanitarian aid to Ukraine, particularly the embattled port city of Mariupol, a fresh round of sanctions and new pressure on Moscow's energy sector.
Biden arrives in Brussels on Wednesday night. Thursday's meetings will bring together NATO leaders to decide on troops, sanctions and other measures designed to aid war-torn Ukraine and to bring Russian President Vladimir Putin to his knees.

WASHINGTON —  President Joe Biden landed in Brussels on Wednesday for urgent meetings this week with members of NATO, the G-7 and the European Union as the continent reels from Russia's unprovoked war against Ukraine that's shattered 70 years of relative peace and security in the region. 

As the Kremlin wages its medieval siege war inside Ukraine, just outside the border, more than 35 countries have come together to help tip the scales in favor of Kyiv — the largest voluntary coalition in the history of modern warfare. Missiles, helicopters, Humvees, ammunition, body armor, intelligence reports, money and humanitarian aid are all flowing into Ukraine, where they are having a tangible impact on the course of the conflict.