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CNN is announcing that a federal air Marshall has fired a weapon and killed a passenger at Miami International Airport. Apparently, the passenger, a U.S. citizen who has been identified as 44-year-old Rigoberto Alpizar, was "moving aggressively" in the aircraft's cabin and had indicated that he had a bomb in his carry-on luggage. American Airlines Flight 924 was on a stopover on its route from Medillin, Columbia to Orlando when the incident occurred.

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