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    U.S. military tracks high-altitude balloon over Utah

    00:35
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Piece of 9/11 jet found in Manhattan

02:10

More than 11 years after 9/11, a piece of landing gear, believed to be from one of the planes that crashed into the World Trade Center towers, has been found. Authorities say workers inspecting the building made the startling discovery, and it is being treating as a crime scene. NBC’s Rehema Ellis reports.