Surrounded by his friends, fellow veterans and loved ones chanting “U.S.A.!” 92-year-old Pearl Harbor survivor Robert Coles beamed as he was wheeled through Logan International Airport yesterday – a moment that moved him one step closer to returning to Hawaii to mark the 75th anniversary of the attack that changed his life. Coles of Machias, Maine, was a 17-year-old radioman apprentice serving on the destroyer USS Bagley when the Japanese surprise attack on Dec. 7, 1941, claimed the lives of more than 2,000 of his brothers in arms.