Vice president seemingly contradicts Trump at Munich conference, as the president has been critical of the alliance.
Trump's contradictory remarks on NATO, calling it "obsolete" during the U.S. election campaign but also supporting it, as well as his praise for Russian President Vladimir Putin, have deeply unsettled allies who fear for transatlantic ties.
Jens Stoltenberg announced 3.8 percent of spike in real terms across Europe and Canada.
NATO and EU officials are increasingly worried about Russia's ability to spread disinformation via TV and internet.
The upcoming mass drill is the largest such operation on Lithuania’s borders, according to a lawmaker.
Secretary General Jens Stoltenberg said NATO was reacting to Russian reinforcements in the region but did not want a new Cold War.
The defense committee recommends raising spending in the face of new political challenges.
U.S. tanks are part of a military buildup designed to deter Russian aggression in Eastern Europe.
Interceptions have remained high since a huge spike in 2014.
The Russian leader said he does not always understand the West in Stone's new documentary.
Moscow has been working on missiles to overwhelm defences.
The U.S. could simply provide military equipment and logistical support to its European allies.
Russian and Belarusian paratroopers are to take part in drills in the Balkans.
Jens Stoltenberg spoke as 4,000 troops prepare to shore up defenses around the Baltic Sea.
Iskander units were drafted in the exercise close to the Estonian border.
Estonia’s Ministry of Defence claims Russian jets violated its airspace four times in 2016.
Baltic armed forces are set to practice urban warfare in an artificial town.