President George W. Bush got a deluxe, six-hour physical carried out by 14 doctors his first since taking office. Apart from having a few skin lesions removed, the physicians deemed him to be in excellent health and liable to stay that way for the rest of his presidency. The president sneaks the occasional cigar, but it doesn’t seem to have affected him much.

Britain, America and Russia signed a Limited Nuclear Test Ban Treaty at Moscow to prohibit nuclear weapons tests "or any other nuclear explosion" in the atmosphere, in outer space, and under water. Underground nuclear explosions must not cause "radioactive debris to be present outside the territorial limits" their own country. The nuclear powers thus demonstrated a common goal to "an end to the contamination of man's environment by radioactive substances." The treaty was the result of over eight years of negotiations resolving issues of verification and deep-seated differences in attitudes to arms control and security. A total of 108 countries had signed before the LNTB Treaty entered into force 10 Oct 1963.