<a href="https://en.wikipedia.org/wiki/Starfish_Prime" id="mwAWo" rel="mw:WikiLink" title="Starfish Prime">Starfish Prime</a> tests the effects of a <a href="https://en.wikipedia.org/wiki/High-altitude_nuclear_explosion" id="mwAWs" rel="mw:WikiLink" title="High-altitude nuclear explosion">nuclear test at orbital altitudes</a>.