The first U.S. observation balloon of World War I is shot down north of the village of Villers sur Marne, France. The French-built balloon is manned by members of the 2nd Balloon Co., who both escape safely after the attack by a German pilot flying an Albatros.
Air Force Gen. Alexus G. Grynkewich assumed command of U.S. European Command on July 1, taking over the key assignment as the U.S. and its allies contend with a resurgent Russia and a grinding war in Ukraine.