On board USS Carl Vinson, a Canadian Capt. Rory MacDonald, a Catholic Chaplain visiting as part of an exchange program with Canada, leads prayer during Catholic Mass in the ship's forecastle March 7. The ship is underway in support of Southern Seas 2010, a major component of Commander, U.S. Naval Forces Southern Command Partnership of the Americas maritime engagement strategy and theater security cooperation activities to enhance regional stability and strengthen relationships among regional partners.