President Volodymyr Zelenskiy warned European NATO members on Tuesday that they risked being attacked by Russia if it was not defeated in Ukraine, urging them to heed U.S. calls to sign off a big new spending goal for the alliance at a summit.

Julianne Smith, former US Permanent Representative to Nato, talks about how President Trump will try not to talk about Russia at the Nato Summit.

President Donald Trump heads to a two-day NATO summit in Europe laden with uncertainty over Iran’s response to U.S. air strikes, the fate of Russia’s invasion of Ukraine and the future of U.S. troops