George Miller, who will graduate from Doherty High School next month, applied to the U.S. Military Academy at West Point, N.Y., the Naval Academy in Annapolis, Md., and the Air Force Academy, in the hope that one of the prestigious schools would accept him. To Miller’s surprise, he was accepted by all three. “It was a shock,” said Miller, who will attend the Air Force Academy in the fall. “It was really unexpected and exciting.” Applying to one of the five federally funded service academies — Navy, Air Force, West Point, Coast Guard or the Merchant Marine — is a highly competitive process, with acceptance rates ranging from 10%-15%. Getting accepted into one of these schools is a major accomplishment. Acceptance into multiple academies is exceptionally rare. “It’s not something you see every day,” said David Miller, George’s father. “But George has always been highly motivated.…