EKW-I don't think I'm picking up anything on the MVT, it seems to be happening once I get into the city. I can't locate any objects in the tire, just multiple cuts. I've exhausted my supply of tubes, as I never seem to have much luck with patch kits, and am tired of changing tires at work and riding home on about 40#'s of pressure (the best my hand pump seems to do). I'll wheel the bike home on the Metro, the change of pace won't kill me. Also, if there were a persistent problem with the trail, I would certainly alert DC members. A few years ago someone was putting tacks on the trail, somewhere between Slater's Lane and the 14th Street Bridge. I advised other members and contacted the Park Service (who were very responsive). I can't wait for my new Conti Tour Ride's, they should really help cut down on these flats. Have a great ride home (if you can get out in advance of the storm), I'll look forward to a dry walk from the Metro :-)