Frederick airport now has a air traffic control tower which began operations about a year ago. After 9-11 the FAA restricted flights by small planes to air fields closer to Washington and many more flights now arrive here.
The MetLife blimp stopped over night earlier this month on its way to another event in the southern US. It stayed a few extra days as a storm with heavy winds moved up the eastern part of the US. We see this one and the Goodyear blimps once or twice a year as they cover golf tournaments, football games and the Preakness horse race.