WASHINGTON — The Metropolitan Washington Airports Authority board of directors did a turnaround on Wednesday and voted 11 to 1 to approve the construction of an above-ground station for the metrorail extension to Dulles International Airport.

MWAA had pushed hard for an underground station, but Transportation Secretary Ray LaHood included an above-ground station in his proposal to reduce costs and settle a dispute between the authority and two Virginia counties over the growing cost of the project.

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