Trade war escalates between U.S. and China as Pompeo visits North Korea
The U.S. has imposed tariffs on $34 billion worth of Chinese products and China retaliated with tariffs on American goods. This comes as Secretary of State Mike Pompeo travels to North Korea for talks on denuclearization. "Face the Nation" moderator and CBS News senior global affairs correspondent Margaret Brennan takes CBSN through the latest developments.