01/23/1968
https://www.presidency.ucsb.edu...
"I, Lyndon B. Johnson, President of the United States of America, do hereby extend through the year 1966 the period during which all persons are specially invited to see the United States, visit our hi..."
"Today, we begin to be masters of our environment."
"I believe that with your help and your continued cooperation, water pollution is doomed in this century."
"I am pleased with this opportunity for the United States to participate with Japan in the joint solution of health problems which will have worldwide benefits."