DOTPresident Trump's support of a $22.5 billion, 10-year renovation of Dulles International Airport in Loudoun County, Virginia is raising questions from industry observers about how the new debt will be serviced along with costs about existing outstanding bonds. The Metropolitan Washington Airports Authority operates Dulles International Airport, which is about 25 miles east of downtown Washington D.C.MWAA also operates Reagan National Airport, which is just across the Potomac river from the city and the Dulles Toll Road. "The investment of more than $20 billion represents a significant increase over the $7 billion previously allocated for the Dulles International modernization program," said MWAA. MWAA operates Dulles and Reagan National Airport under a lease from Congress. Dulles and Reagan National typically handle about similar numbers of passengers per year.