CHARLESTON, S.C. (WCIV)-- The Secretary of the Navy Ray Mabus has announced that a new guided-missile destroyer will be named after a Charleston native for his sacrifices while serving with the U.S. Marines in Vietnam.The Arleigh Burke class destroyer will be named the USS Ralph Johnson.Pfc. Ralph H. Johnson was awarded the Congressional Medal of Honor posthumously for throwing himself on a grenade after shouting a warning to his fellow Marines. His actions saved the life of his platoon leader and prevented the enemy from penetrating his sector of the patrol's perimeter in the Quan Duc Valley in Vietnam. The Ralph H. Johnson VA Medical Center also bears his name."It is an honor to walk through this VA's doors every day and know that we have the privilege of bearing the name of a true American hero," said Scott Isaacks, acting director of the Ralph H. Johnson VA Medical Center. "We at the VA strive to honor our nation's heroes each day and we are so pleased to see Ralph's legacy continue to be shared with current and future generations."