Protesters walk away from the Herndon office of Rep. Frank R. Wolf on Monday after a press conference about the Dulles Metrorail project. The protesters, many union members, are upset that Mr. Wolf wants the Phase II contracts to be reopened to more bids rather than using a project labor agreement (PLA). (Barbara L. Salisbury/The Washington Times)

Protesters walk away from the Herndon office of Rep. Frank R. Wolf on Monday after a press conference about the Dulles Metrorail project. The protesters, many union members, are upset that Mr. Wolf wants the Phase II contracts to be reopened to more bids rather than using a project labor agreement (PLA). (Barbara L. Salisbury/The Washington Times)