NATO chief cautions U.S. Congress against 'more assertive Russia'

The head of the North Atlantic Treaty Organization warned the U.S. Congress on Wednesday of the threat posed by "a more assertive Russia" to the alliance, including its violations of the Intermediate-range Nuclear Forces Treaty.

"NATO has no intention of deploying land-based nuclear missiles in Europe," NATO Secretary-General Jens Stoltenberg said. "But NATO will always take the necessary steps to provide credible and effective deterrence."