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.
The Space Development Agency is set to launch 21 Tranche 1 data transport satellites on Oct. 5—its fourth Tranche 1 mission since last fall and the first to carry Northrop Grumman-built satellites.