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Democratic lawmakers have raised concern that Trump might fire Mueller.

Despite the challenges of low temperatures and thin air, generations of meteorologists have been working at the station for over half a century. Seven people are currently working at the site.

Despite disputes and frictions, China-US economic and trade cooperation has expanded steadily and generated huge benefits for people of both sides, with bilateral trade rising 13.7 percent year-on-year to 2.64 billion during the first nine months of this year.

Dennis van Oossanen, Nike vice-president of Greater China Direct-to-Consumer, said the company is committed to bringing the best products, after-sales service and shopping environment to Chinese consumers.

Describing himself as an optimist looking for the positive science of things, Dobbs said: "There's so much of the positive side. Think of how many people have been lifted out of abject poverty over the last 20 years."