News Wrap: NYC officials release documents showing city was aware of toxic air after 9/11

Tuesday on the News hour, New York City officials released documents that raise new concerns about air quality following the Sept. 11 attacks, authorities in Miami say all five people killed by a plane crash this weekend were in a van used for cleaning crews that service planes and more than 600 flights were cancelled in the UK due to a problem with the country's air traffic control system.

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