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"Sikorsky Aircraft Corp. announced Tuesday a milestone in its production of MH-60 Seahawk helicopters -- delivery of the 400th aircraft to the U.S. Navy."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Business_News/Security-Industry/2013/07/23/Navy-receives-400th-MH-60/UPI-86671374613820/>