I did walk the final 1.5 miles, but the beginning of the commute is way too dangerous for walking. 6-8 lanes across with on/off ramps to 270 and 495. Especially with lots of impatient drivers making lots of crazy and stupid decisions. Not to mention all of the cyclists in DC who are a bunch entitled a**es. Seriously, first the take over the roads like they own them in the ridiculous spandex outfits, cycling on highways, though red lights and stop signs. And then the other day I was hiking by the C&O canal and got run off the trail by a cyclist.
Oh and BTW I do get lots of exercise and am in great shape. Walk 2 miles every morning with my dag on go hiking regularly. Thanks for thew advice tho!