Some road closures will be happening on Saturday. Hopefully this won't affect anyone who plans to drive.

In DC: National Marathon

http://voices.washingtonpost.com/get...dc_on_sat.html

In Arlington: protest near the Pentagon

http://www.arlingtonva.us/Department...cle.asp?ID=639

Mostly this affects roads near the Pentagon and Crystal City, although Washington Blvd will be closed between Memorial Bridge and 395 from 12-3.