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Greg Freiherr

Greg Freiherr has been contributing to Air & Space for almost 30 years.

Stories from this author

Airliners today are data centers in flight, using multiple connections to ground stations. Keeping them cybersecure requires constant vigilance.

Will Your Airliner Get Hacked?

Meet the people who are making sure it won’t.

At AirVenture in Oshkosh, Wisconsin, airplane fans have found a good spot by a brace of twin-tailed classic aircraft to watch the airshow.

On Patrol at the World’s Biggest Fly-In

What it’s like to put on the orange vest at Oshkosh.

“Andy,” a lunar rover designed by Astrobotic and Carnegie Mellon University, takes a test drive at a cement plant near Pittsburgh last year.

Will Anyone Win the Google Lunar XPRIZE?

One giant leap for robot kind.

An interceptor missile leaps from its launcher on Kwajelein Atoll to smash into a target impersonating a medium-range ballistic missile.

How to Stop a Nuke

The Army’s 11th Air Defense Artillery Brigade does a dress rehearsal of a nuclear attack.