Kennedy became the 35th President of the U.S. in 1960, at age 43. Amid heightening Cold War tension between the U.S. and U.S.S.R., Kennedy marks achievements in the area of domestic reforms as well as the ideal of world peace, including the signing of the first agreement on limitation of nuclear armaments and a partial ban on nuclear testing. Courageously grappling with the Vietnam War, the problem of racial discrimination and the Cuban Missile Crisis, he arouses many of his countrymen, but is assassinated in Dallas in 1963.