Keywords: US Navy 110704-N-AU127-185 USS Constitution fires a 21-gun salute toward Fort Independence on Castle Island.jpg � en BOSTON July 4 2011 USS Constitution fires a 21-gun salute toward Fort Independence on Castle Island during the ship's July 4th underway as part of Boston Harborfest The six-day Fourth of July festival showcases Boston's Colonial and maritime heritage to honor and remember the past celebrate the present and educate the future with reenactments concerts and historical tours U S Navy photo by Mass Communication Specialist Seaman Shannon Heavin/Released 2011-07-04 110704-N-AU127-185 Navy http //www navy mil/view_image asp id 103580 U S Navy photo by Mass Communication Specialist Seaman Shannon Heavin PD-USGov-Military-Navy Images from US Navy location BOSTON USS Constitution in 21st century 21 gun salute |