Hegseth ordered more strict grooming and fitness standards and less training on subjects like the Privacy Act, cybersecurity and controlled information.
The head of the Space Force's acquisition command said workforce cuts are "incredibly challenging," but the command is adjusting to minimize the impact.
Future Block 4 capabilities are intended to bring the F-35 better sensors, improved sensor integration, and the ability to carry more and deadlier weapons.
The U.S. is in a race to field the capability and develop systems to defend against hypersonic missiles, which China and Russia are developing and testing.
Experts say it's unlikely the Air Force could save $15 billion only targeting the kind of diversity and climate change programs Sec. Hegseth has derided.
The Space Force is evaluating what systems it already has in development to support President Trump's order and what capabilities it would need to build.