NATO Secretary General Warns US Congress of Challenges to Alliance

NATO Secretary General Jens Stoltenberg used a speech to a joint session of the U.S. Congress Wednesday to warn of a growing threat from Russia. Stoltenberg's unusual speech marked the 70th anniversary of the North Atlantic Treaty Organization. NATO has been criticized by President Trump. As VOA's congressional correspondent Katherine Gypson reports, Stoltenberg acknowledged the role President Trump has played in reshaping the U.S. role in the alliance.