Old Ironside’s first underway of 2013 honored heroes, past and present. The USS Constitution sailed in Boston Harbor on June 4 to honor those who responded to the Boston Marathon bombings on April 15 as well as to pay tribute to those who fought in the Battle of the Midway in 1942. More than 375 Boston first responders took part in the three-hour cruise, which included a wreath-laying ceremony for victims of both the bombing and the battle, as well as a 21- and a 17-gun salute. The first responders onboard came from the FBI, Boston Fire and Police Departments,…