I visited Fort McHenry for the first time. A Very Neat Place!
Go here: http://en.wikipedia.org/wiki/Fort_McHenry to learn more.
The guy in green is a park ranger.... the others are in period dress... the ranger was giving a lecture on how the fort was used over the years... The War of 1812, Civil War, WWI etc.
National Anthem
The Star Spangled Banner