Inflating Winzen Research balloon for 1958 balloon ascent to the stratosphere by Malcolm D Ross and Alfred H Mikesell.
<a href="https://en.wikipedia.org/wiki/User:catrachos" class="extiw" title="en:User:catrachos">John Mikesell</a>
1958-05-06
Photograph from collection of Alfred H Mikesell, who was an astronomer for the United States Naval Observatory at the time.