Lyndon Johnson: “It is going to be difficult and it is going to require sacrifices.”

We are grateful for the impressive gesture of good will and partnership that you have extended to us.

This program, sponsored by the World Meteorological Organization, constitutes one of the largest and most complex scientific and technological undertakings ever attempted as an international effort.

Your reward--and it is coming--will be seen in the faces of children who will come down the road that you have helped to open.

In that pursuit, Mr. President, United States support will be gladly given.