Lt. Frederick E. Humphreys becomes the first Army pilot to solo in the Wright Military Flyer, US Army Aeroplane No. 1, at College Park, Md. A few minutes later, Lt. Frank P. Lahm becomes the second.
The Pentagon awarded a contract worth over $2 billion for the next batch of F-35 engines to Pratt & Whitney on June 5. The deal for Lot 17 F135 engines, totaling $2.02 billion, is expected to be completed by December 2025.