根据以下内容回答题：John F．Kennedy was，at 43，the youngest American to be elected president，and also the first Roman Catholic．John’S grandfather was a poor Irishman who migrated to America．This immigrant and his son，Joseph，accumulated wealth and political power．Thus，John Kennedy had the advantage of wealth family and good education． During World War Il，John F．Kennedy had an outstanding record in the Navy．After the war，Kennedy worked briefly as a newspaperman，and then entered politics．He was three times elected to the House of Representatives before becoming a senator from Massachusetts．In 1960 he was elected president in a very close race in which there were charges of irregularities． Kennedy’s term of office was highlighted by appeals to idealism，a broadened base of political participation，and improved civil right．In international affairs，Kennedy saw the failure of the American．backed invasion of Cuba，and the Cuban missile crisis which brought Russia and the United States to the brink of war． The Kennedy family has known triumph and tragedy．One of John Kennedy’S sisters was mentally retarded and an older brother was killed during a wartime aerial mission．John Kennedy was assassinated——as was his outspoken brother，Robert Kennedy．The family has suffered scandals of sex，alcohol，and drugs in both John’S generation and in this present genera-tion．Many believe that for the youn9，wealth and prominent family are more of a curse than a help．

What makes John Kennedy such a famous president in American history?