WASHINGTON - A citizens group has dropped a lawsuit aimed at blocking a proposed $5.1 billion, 23-mile subway extension to Washington Dulles International Airport, but the project faces a bigger challenge - whether the Federal Transit Administration will provide $900 million of much-needed funding.

TysonsTunnel.org - a citizens group that wanted more competitive bidding on the project and opposed other aspects of it - on Wednesday dropped the suit it filed Nov. 27 against the U.S. Department of Transportation and the FTA in U.S. District Court in Alexandria, Va. Citing the FTA's decision in late-January to defer from giving the $900 million to the project, the group's president said it was a sign that competitive bidding could occur in the future.

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