The buildings in Rosslyn are the tallest in the near-to-DC area, at least. Even those buildings have a height restriction because they are almost in the flight path into and out of (Reagan) National Airport. There is a height restriction within DC itself, so as not to overwhelm the Capitol. It makes the city have its own distinct flavor. In the suburbs now there are lots more tall buildings than there were in years past.

I guess a skyscraper is whatever you think it is!