First World War, Belgium, 1915. A French pilot, after a failed attempt to attack a German Zeppelin hangar in Haren, made an emergency landing over friendly territory and got his biplane stuck vertically in a tree. Soldiers are climbing up the tree. 
Fotocollectie Het Leven (1906-1941) of Spaarnestad Photo, n° SFA001017873, kept at Nationaal Archief
<span lang="en">Anonymous</span><span style="display:none">Unknown author</span>
<a rel="nofollow" class="external free" href="http://www.geheugenvannederland.nl">http://www.geheugenvannederland.nl</a>