A new quarter honoring the Vicksburg National Military Park was released on August 29th and a ceremony was held in the park on August 30th. The tails side of the coin depicts the USS Cairo.

Read about it:

http://americathebeautifulquarters.statequarterguide.com/mississippi-america-the-beautiful-quarter/

http://www.usmint.gov/pressroom/?action=press_release&id=1280