What limits did the U.S., U.S.S.R, and Great Britain agree to regarding nuclear weapons testing in 1963?
each nation was permitted a limited number of tests per year
testing could only occur underground
testing plans had to be submitted to the other countries for approval
all testing had to take place on uninhabited islands
each nation was permitted a limited number of tests per year
testing could only occur underground
testing plans had to be submitted to the other countries for approval
all testing had to take place on uninhabited islands