Frequent DCist photo contributor Angela Kleis was walking her dog a few weeks ago to their usual park, when suddenly she found herself "surrounded by Marines":

Turns out, they do this every Tuesday from Memorial Day through August. Since I just moved here last August, I missed it before. The band plays and they go through the silent drill, which is damn cool. I could never catch the baton like that! They start practicing around 5:45 p.m.