View through the periscope of the U.S. Navy submarine USS <i>Seadragon</i> (SSN-584) as Captain G.P. Steele searched for an opening in the polar ice through which to surface, September 1960.
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Unknown author<span style="display: none;">Unknown author</span></div>
U.S. Navy photo <a rel="nofollow" class="external text" href="https://www.history.navy.mil/our-collections/photography/numerical-list-of-images/nhhc-series/nh-series/USN-1050000/USN-1050054.html">USN 1050054</a>