It looks like you take the orange line from Rosslyn to the Smithsonian to get close to the Lincoln Memorial.
We take the orange line from New Carrollton on the other side of town to the Smithsonian.
http://www.wmata.com/rail/maps/map.cfm
This is going to be great!
Unless I've missed it, nobody has come up with a solid suggestion.
Since most people are using the MetroRail, and the closest MetroRail station to the Lincoln Memorial is the Smithsonian station, why doesn't everyone meet outside of the main entrance of the Smithsonian MetroRail station at 9:00 a.m. on Saturday, August 28th?