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Assistant Attorney General Makan Delrahim, head of the Justice Department's antitrust division, said the deal would hasten the development of 5G, the next generation of wireless.

At Waterloo station in central London, passengers are lining up to take Bus 521, one of the routes in London with green buses powered by BYD battery and technology.

At a ceremony on Wednesday conferring the police flag on China's police force, President Xi Jinping stressed that political and legal organs need to focus on prominent problems that people have reported; promptly improve mechanisms for supervising and restricting the exercise of power; and implement strict, standardized, fair and civilized law enforcement.

Asked whether his advisers should accept information on an opponent from Russia, China or another nation or call the FBI this time, Trump said, "I think maybe you do both," expressing openness to reviewing the information.

At least nine others have testified despite being instructed by the White House not to do so, Schiff said.