Just read an article on DCA at MSNBC.com. Two points came out.
1. It may "reopen" with limited service form planes smaller than the 757.
2. May open but funnel air traffic off to the south on take off away from major installations in D.C. (Never been to DCA, but just going by what the article says).
The article also says they moved the planes from DCA to both Dulles and BWI to assist there.
DC-8 61/63/71 DC-9-30/50 MD-80/82/83 DC-10-10/30 MD-11 717 721/2 732/3/4/5/G/8/9 741/2/4 752 762/3 777 A306/319/20/33 AT