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At a news conference in Addis Ababa, the nation's transportation minister confirmed earlier indications that the plane's anti-stall system was repeatedly triggered in the minutes between the takeoff and crash, but he did not draw definitive conclusions about the crash's cause.

At midday, the Dow erased 551.02 points, or 2.20 percent, to 24,476.05. The S&P 500 decreased 50.54 points, or 1.87 percent, to 2649.52. The Nasdaq Composite Index fell 69.88 points, or 0.98 percent, to 7,088.55.

At a launch ceremony held in the China National Film Museum on July 29, Guo said outdoor screening was one of his favorite childhood entertainments while growing up in a town in Shandong province.

At Wednesday's conference, Zang added that he and his colleagues would like to answer legislative questions from the public and increase communication with the public.

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.