<div class="description">
<ul><li><b>Scope and content:</b>  Original caption: National Aeronautics and Space Administration Astronaut Virgil I. Grissom, 35, is prepared for testing in the U.S. Navy centrifuge at Johnsville, Pennsylvania. Grissom is one of three NAA astronauts of whom one will be selected for the first Project Mercury suborbital space flight.</li></ul></div>
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Unknown author<span style="display: none;">Unknown author</span> or not provided</div>
1961<div style="display: none;">date QS:P571,+1961-00-00T00:00:00Z/9</div>
<a href="https://en.wikipedia.org/wiki/U.S._National_Archives_and_Records_Administration" class="extiw" title="en:U.S. National Archives and Records Administration">U.S. National Archives and Records Administration</a>