Washington, D.C., is getting ready to race. Construction is underway on the National Mall as crews transform the heart of the nation's capital into a temporary

Washington, D.C., is getting ready to race. Construction is underway on the National Mall as crews transform the heart of the nation's capital into a temporary street circuit for the Freedom 250 Grand Prix on Aug. 23, part of America's 250th anniversary celebration. President Trump is expected to …