Currently named Airport Office Building, this is the former Boeing/United Airlines Terminal Building or Old Airport Terminal Building at Cheyenne Regional Airport which is on the National Register of Historic Places.
<a href="//commons.wikimedia.org/wiki/User:Xnatedawgx" title="User:Xnatedawgx">Xnatedawgx</a>
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<span class="int-own-work" lang="en">Own work</span>