A B-52 and B-1B bombers, accompanied by a KC-10 tanker, land at Poltava Air Base, Ukraine, marking the first time since World War II that US bombers have landed in that country. B-17 bombers had flown there 50 years earlier on shuttle bombing missions against Nazi targets in eastern Europe.
The Air Force Research Laboratory is offering free licenses for dozens of its patents, including some for secure microchips, 3D-printable “energetic compounds” for use as propellants or explosives, and powerful magnets that are less reliant on rare earth metals. The...

