Kennedy came into office promising a "New Frontier" and change after a complacent 1950s. His youth and vigor inspired Americans. Key programs included the Peace Corps, pushing to put a man on the moon, and proposals to aid education and the elderly. However, Kennedy faced challenges like a weak economy and tensions with the Soviet Union over Berlin and Cuba. The Cuban Missile Crisis in particular brought the world close to nuclear war. Kennedy also had to navigate the growing Civil Rights movement and calls for desegregation amid violence. His assassination in 1963 left America in mourning and Vice President Johnson took over promising to carry on Kennedy's legacy through programs like the Great Society, aimed at reducing poverty.