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LOUDOUN COUNTY, Va. (WUSA) -- Loudoun County lawmakers are facing a July Fourth deadline on whether to approve the Silver Line from Dulles Airport to Ashburn.

Now three county supervisors are trying to buy more time. They want to push the deadline back to December 1.

The group is trying to secure more funding from the state.

Any extension of the Silver Line from Reston towards the airport won't open until 2017 at the earliest.

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