house said it is moving forward implementing tariffs later this month on up to 50 billion dollars in chinese imports and restricting certain chinese investments in the united states. china responded saying it doesn't want a trade war though it is prepared to fight one. the u.s. this week also imposed tariffs on steel and aluminium from canada, mexico, and the european union. beyond economic and trade differences, the u.s. and china are also at odds over china's military construction on a disputed area of the south china sea. speaking in singapore, defense secretary james mattis urged china to change its behavior. >> there are consequences that will continue to come home to roost, so to speak, with china if they do not find a way to work more collaboratively with all of the nations who have interests. >> last week the pentagon rescinded an invitation to china to participate in a multi-lateral naval exercise. mike? mike: rich edson reporting from the state department. thank you. despite growing fears over