The folks over at Dulles Metro extension are breaking out the construction tools … and the credit cards. $900 million of the $2.83 billion price tag of the initial 11.6-mile leg is in that Transportation Department spending bill tied up in Congress and under threat of veto by President Bush. But with or without the money, officials plan to start work, reports The Examiner. Is it just us, or does this violate everything you ever…