Retired Lt. Col. Robert L. Riedenauer, who flew development aircraft such as the SR-71 and U-2 while in the Air Force and later, as a Lockheed Martin test pilot, the F-117 stealth fighter, died at age 70 on April 23 at his home in Palmdale, Calif. The Associated Press reports he had fought a long battle with cancer. The City of Lancaster, Calif., inducted Riedenauer into its Aerospace Walk of Fame in 2002.
PHOTOS: Air Force Shows B-21 Refueling Tests with KC-135
April 15, 2026
The Air Force released new photos of the B-21 Raider conducting aerial refueling tests with a KC-135 Stratotanker—confirming a key milestone in the new long-range strike bomber’s development and offering a rare glimpse of the secretive aircraft’s features.