Hundreds of family, friends, and fellow Marines say goodbye Saturday to a Mississippi Marine killed in Iraq.  22-year-old Lance Corporal Casey Casanova was laid to rest today in Lincoln County.  The McComb native was killed by a roadside bomb last Friday.  The services were filled with musical tributes and tearful memories of her dedication to the Marine Corps.  Military officials gave Casonova's mother a Purple Heart during the service.  Casey Casanova is believed to be the first woman from Mississippi to be killed while fighting in Iraq.