I came out of L'Enfant Plaza under the overpass, and as I approached the street I saw three plastic bags, the smiley face with "Have a Nice Day" on it. Unused, just lying there, probably from a roll of them. I started to go past them, but I couldn't, so I doubled back and picked them up. Got to the street and as soon as I took a left, I saw two more bags, so I bent over and picked them up as well. Walked a little further and saw about two dozen of them against a construction fence, just cursed and walked by.
At day's end, I did pick up another bag that was still lying there, but most of the others were out of reach, on the other side of that construction fence.