September 16, 2009: The 1,400 U.S. mechanics who maintain United Parcel Service Inc's (UPS.N) worldwide fleet of 263 aircraft have authorized a strike, union officials said on Tuesday, but contract talks will continue later this month.

The vote represents a ratcheting up of the pressure in negotiations between the two sides just as UPS, the world's largest shipping company, enters its busiest season.

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