Thanks for the comments thus far, Healers Of Planet Earth!
If you have not been to D.C. Here's the little I know about airports and getting myself around town -- may be helpful for those who have never flown into the D.C. area.
IAD (Dulles International Airport) http://mwaa.com/dulles/dulles.htm is furthest away from the downtown area. I have not flown into Dulles.
DCA (aka National; Reagan) http://mwaa.com/reagan/reagan.htm I flew regularly into this airport because I could get on the metro there and get pretty darn close to where I was going. At my destination Metro stop, a cab was generally available if further than an easy walk.
BWI (aka Baltimore Washington Int'l; Thurgood Marshall) http://www.bwiairport.com/en I landed at BWI one time and took an airport shuttle to the Swankin-Turner office at a cost of about $45 one way including tip.
An option for traveling to D.C. from any of the airports would be to take a shuttle or a cab to the nearest metro station and use the great public transit system D.C. offers. Washington Metropolitan Area Transit Authority better known in D.C. as the METRO has a pretty user friendly website tool to find your way from A to B via C, etc. :) http://wmata.com/ Since I'm there so often, I ordered a handy SmartTrip Card so I always have my fare handy. http://wmata.com/fares/smartrip/
For close Metro Stops, see
-- your hotel website
-- the link to the map and directions for the Lutheran Church of the Reformation
-- Dupont Circle is easy walking distance to Swankin-Turner Law Offices