Maiden flight of Morane-Saulnier Type AF (MoS 28.C1). The aircraft was no tbetter than the Spad S.XIII and wasn't entered into production. A naval version, the Type AFH, was developed and tested.
How to cite this article: Rickard, J (28 December 2007), 23 June 1917, http://www.historyofwar.org/firstworldwar/daybyday/1917_06_23.html