It's the birthday of Ulysses S. Grant, hero of the Civil War and the only sitting president to have been arrested. Here's the story of how Grant was out speeding through Washington DC and ended up in trouble with the law.
If you're starting your tour of the National Mall at the US Capitol, your first stop as you head west is likely to be the US Grant Memorial. It's probably good to get it out of the way early, cause it's pretty strong stuff.