The USS Constitution to sail under its own power for just the second time in more than 100 years.
The USS Constitution is the oldest commissioned warship still operating anywhere in the world.
It earned the nickname "Old Ironside" in a battle during the War of 1812. The USS Constitution got the better of the HMS Guerriere from Britain.
The ship will sail in and around Boston Harbor to commemorate that battle.
The USS Constitution first sailed in 1797 and stopped sailing under its own power in 1881. 200 years later, it sailed again.