After months of uncertainty, the future of Metro’s Silver Line is clear: rail is coming to Dulles International Airport and Loudoun County.

The Loudoun County Board of Supervisors voted 5-4 Tuesday morning to support the second phase of the Silver Line construction, which will bring Metrorail to Dulles Airport and to two planned stations in eastern Loudoun. Without Loudoun’s commitment to contribute nearly $270 million toward construction costs, the second part of the long-planned projectwould have been in jeopardy.

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