Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. It’s been over a decade since engineers officially got to work on the X-59 Quiet SuperSonic Technology (QueSST). Designed in collaboration with NASA , Lockheed Martin ’s state-of-the-art aircraft is built to fly very high and very fast, all without leaving a telltale sonic boom in its wake. Lockheed finally revealed the X-59 to the public in January 2025 a few years behind schedule, and completed its first subsonic test flight that October.  They’ve been making up for lost time ever since. The X-59 has flown on nine more occasions, most recently on April 14 when it accomplished some of its biggest feats to date while cruising over the Mojave Desert in California. This time around, however, Lockheed was ready to show off the aircraft in action. From the opening maneuvers, it’s clear that a ride in the plane isn’t for the faint of heart .…