Astronaut <a href="https://en.wikipedia.org/wiki/Virgil_Grissom" class="extiw" title="w:Virgil Grissom">Virgil Grissom</a> walks on the recovery ship after completing the 15-1/2-minute <a href="https://en.wikipedia.org/wiki/suborbital" class="extiw" title="w:suborbital">suborbital</a> <a href="https://en.wikipedia.org/wiki/Mercury-Redstone_4" class="extiw" title="w:Mercury-Redstone 4">MR-4</a> mission.
NASA
1961-07-21
<a href="https://en.wikipedia.org/wiki/Marshall_Space_Flight_Center" class="extiw" title="w:Marshall Space Flight Center">Marshall Space Flight Center</a>'s Marshall Image Exchange: <a rel="nofollow" class="external text" href="http://mix.msfc.nasa.gov/abstracts.php?p=1496">description</a>, <a rel="nofollow" class="external text" href="http://mix.msfc.nasa.gov/IMAGES/HIGH/6116421.jpg">image file</a>