The United States concludes <a href="https://en.wikipedia.org/wiki/Operation_Fishbowl" id="mwxg" rel="mw:WikiLink" title="Operation Fishbowl">Operation Fishbowl</a>, its final above-ground <a href="https://en.wikipedia.org/wiki/Nuclear_weapons_testing" id="mwxw" rel="mw:WikiLink" title="Nuclear weapons testing">nuclear weapons testing</a> series, in anticipation of the 1963 <a href="https://en.wikipedia.org/wiki/Partial_Nuclear_Test_Ban_Treaty" id="mwyA" rel="mw:WikiLink" title="Partial Nuclear Test Ban Treaty">Partial Nuclear Test Ban Treaty</a>.