Our labor unions are not narrow, self-seeking groups. They have raised wages, shortened hours, and provided supplemental benefits. Through collective bargaining and grievance procedures, they have brought justice and democracy to the shop floor.

Let both sides seek to invoke the wonders of science instead of its terrors. Together let us explore the stars, conquer the deserts, eradicate disease, tap the ocean depths, and encourage the arts and commerce.

A country is as strong, really, as its citizens. And I think that mental and physical health - mental and physical vigor - go hand in hand.

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.

And is not peace, in the last analysis, basically a matter of human rights -- the right to live out our lives without fear of devastation – the right to breathe air as nature provided it -- the right of future generations to a healthy existence?" (John F. Kennedy, June 10, 1963, American University speech)

In the years since man unlocked the power stored up within the atom, the world has made progress, halting, but effective, toward bringing that power under human control. The challenge may be our salvation. As we begin to master the destructive potentialities of modern science, we move toward a new era in which science can fulfill its creative promise and help bring into existence the happiest society the world has ever known.

Peaceful circulation has been interupted by barbed wire and concrete blocks. For a city or a people to be truly free, they must have the secure right, without economic, political or police pressure, to make their own choices and live their own lives.