Last night on PBS they aired one of the best food shows on TV i've ever seen. It's called sandwiches you will like. The host went around the country, showing and eating sandwiches each area is famous for (Lobster roll in Maine, Pat's and Geno's in Philly, Muffelatta in New orleans, etc.)
One of the sandwiches they showed was this unbelievable falafel sandwich from somewhere in Massachusetes. It had hummus, sheppard's salad, tahihi, etc. on it. Any of the hounds know where in the DC area one could find a great falafel sandwich like that?
I've also included the link to the show's website.