BILL REVELLE: As a college student, I was on an oceanographic expedition where we saw a nuclear test from about 1,500 nautical miles away. The sky just really lit up. This is enough to make one very concerned...

Like many good American boys, I grew up with an idolized picture of John F. Kennedy, who was shot fifty years ago last Friday, Nov. 22. That afternoon, I watched his famous 1961 inaugural address, which,...