Simplify the following text for a Grade 10 native English-speaking person.
Original: Principi is a 1967 graduate of the United States Naval Academy at Annapolis , Maryland , and first saw active duty aboard the destroyer USS Joseph P. Kennedy .
Simplified: In 1967 , Principi graduated from the United States Naval Academy at Annapolis , Maryland . He first saw active duty aboard the destroyer USS Joseph P. Kennedy .