VIDEO: Biden meets with Spanish President in Madrid

(NBC) - President Biden who is in Madrid for the North Atlantic Treaty Organization (NATO) summit holds a bilateral meeting with President Pedro Sanchez of Spain to continue coordinating on supporting Ukraine and holding Russia accountable.

The President arrived in Madrid for the NATO summit that will set the course of the alliance for the coming years.

Russia's invasion of Ukraine has sparked a "fundamental shift" in NATO's approach to defense and member states will have to boost their military spending in an increasingly unstable world, the leader of the alliance said today (Tuesday).

Secretary-General Jens Stoltenberg said the meeting would chart a blueprint for the alliance "in a more dangerous and unpredictable world."

Top of the agenda for leaders in meetings Wednesday and Thursday is strengthening defenses against Russia and supporting Ukraine.

Moscow's invasion on February 24 shattered European security and brought shelling of cities and bloody ground battles back to the continent.

NATO which had begun to turn its focus to terrorism and other non-state threats has had to confront Russia once again.