71 things to do in Washington, D.C. this weekend: July 17-19

Summer weekends in Washington are made for exploring, and this one offers plenty of opportunities to stumble onto something memorable. Catch a free performance, discover a new play at Capital Fringe, enjoy an outdoor movie under the stars, spend the afternoon at a Smithsonian museum or cap off the evening with a concert at Wolf Trap, The Anthem or Jiffy Lube Live.