A long-standing ban on commercial supersonic flights over the United States would be overturned in a new rule proposed by the US Federal Aviation Administration. That could pave the way for the possible return of commercial supersonic airliners—as long as such aircraft can reduce the ground-level impacts of their sonic booms.

The FAA originally banned overland supersonic flights by civil aircraft in 1973, following US military tests involving supersonic flights over US cities such as Oklahoma City, Chicago, and St. Louis in the 1960s. But the Trump administration has championed the repeal of the ban to pave the way for supersonic airliners that could operate without disruptive sonic booms. So the FAA’s new rulemaking action on June 30, 2026, follows the direction of an executive order issued by President Trump on June 6, 2025.

The newly proposed rule would replace the 53-year prohibition with an interim “noise-based” certification standard requiring any sonic boom overpressure at the surface to be kept below 0.11 pounds per square foot. That proposed standard is based on the Colorado-based startup Boom Supersonic having demonstrated quiet Mach cutoff flights with its XB-1 aircraft—harnessing specific atmospheric conditions while flying just beyond supersonic speeds at higher altitudes so that the aircraft’s shockwaves are refracted upward into the atmosphere rather than traveling to the ground.

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NASA's inspector general released an audit Tuesday of the agency's Commercial Crew Program, and it looks increasingly likely that Boeing's Starliner crew capsule won't be certified for operational flights to the International Space Station until next year.

That's just three years before NASA's official retirement date for the ISS in 2030, though lawmakers in Congress are seeking an extension until 2032. What's more, declaring Starliner ready for regular crew rotation flights next year would put the Boeing crew capsule a decade behind its original target of 2017.

The inspector general issued six recommendations. NASA officials agreed to all of them. The recommendations include developing a schedule for the next Starliner flight and future crew missions and making sure the schedule is updated to include sufficient time to ensure all of the problems from Starliner's first test flight with astronauts in 2024 are "resolved and documented."

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NASA officials said Tuesday that they are seriously considering sending the full-scale engineering model of the Perseverance rover, which is currently housed at the Jet Propulsion Laboratory in California, to the Moon to expedite their efforts to explore the south pole region.

The car-sized rover nicknamed "Promise," which serves as a testbed for Perseverance and was not otherwise planned for a launch, would land equipped with a multi-mission radioisotope thermoelectric generator (MMRTG) to power it across difficult terrain and through the lunar night. NASA's other rovers primarily operate on solar power.

"We are thinking very hard right now about sending Promise to the Moon," NASA Administrator Jared Isaacman said Tuesday during a monthly update on the agency's plans to build a Moon base.

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