president of the United States from 1961 to 1963 (1917–1963)
John Fitzgerald Kennedy (29 May 1917 – 22 November 1963), often referred to by his initials JFK and Jack, was the 35th president of the United States (1961–1963), a United States senator from Massachusetts (1953–1960), and a United States representative (1947–1953). Kennedy served at the height of the Cold War, and the majority of his work as president concerned relations with the Soviet Union and Cuba. He is the older brother of Robert F. Kennedy and Ted Kennedy, and the first husband of Jacqueline Kennedy Onassis. He was shot in the presence of his wife in Dallas on November 22, 1963.
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I ask particularly that those of you who are now in school will prepare yourselves to bear the burden of leadership over the next 40 years here in the United States, and make sure that the United States — which I believe almost alone has maintained watch and ward for freedom — that the United States meet its responsibility. That is a wonderful challenge for us as a people.
My fellow citizens: let no one doubt that this is a difficult and dangerous effort on which we have set out. No one can see precisely what course it will take or what costs or casualties will be incurred. Many months of sacrifice and self-discipline lie ahead--months in which our patience and our will will be tested--months in which many threats and denunciations will keep us aware of our dangers. But the greatest danger of all would be to do nothing.