During his remarks on April 7, President Joe Biden suggested that trains could cross the country as fast as a plane and a plane could fly around the world at subsonic speeds in 10 years.

“Imagine a world where you and your family can travel coast to coast without a single tank of gas, or in a high-speed train, close to as fast as you can go across the country in a plane. Imagine your children growing up to work in innovation, good-paying jobs in fields that haven’t even been invented yet, like the parents of every computer programmer, every graphic designer, every renewable energy worker once did — imagined,” Biden said, according to a White House transcript.

“We’re going to talk about commercial aircraft flying at subsonic speeds — supersonic speeds. Be able to, figuratively, if you may — if we decided to do it, traverse the world in about an hour, travel 21,000 miles an hour. So much is changing,” he added.

According to Flight Global, NASA and the Federal Aviation Administration, as well as many US manufacturers, are still working on supersonic projects.

Aerion Supersonic, for example, is working on the AS2, a supersonic business jet that it plans to carry passengers in 2027.

Boom company plans to fly its XB-1 supersonic demonstrator this year and build the Overture supersonic airliner, which will take flight in 2026.

The Low-Boom Flight Demonstrator project, a NASA-Lockheed Martin initiative to build a supersonic research aircraft with a muffled sonic boom, has been promoting supersonic developments. According to NASA, the X-59 aircraft will make its first flight in summer 2022.

Biden didn’t specify whether or how his administration plans to support supersonic growth, and a White House analysis of Joe Biden’s infrastructure proposal makes no mention of supersonic jets.

However, Biden’s plan would be ludicrous, according to Western Journal’s contributor Douglas Golden given”the current state of technology and the immutable laws of physics.”

Golden pointed out that the world’s fastest manned plane is the North American X-15 or the Lockheed SR-71 Blackbird, which reached the speeds of March 5 and March 2.8 respectively. The X.15 held one person while SR-71 had two seats, he noted.

Citing an article of Jim Geraghty on National Review, Golden said Biden’s plane capable of going 21,000 mph (about March 27) — 10 times faster than SR-71 —  with a full load of passengers is impossible to make in 10 years because of serious issues beyond engine technology.

“You can imagine the other problem with Biden’s plan if you think hard enough about the SR-71 leaking fuel all over the runway. For a plan that puts so much emphasis on green jobs, the only successful supersonic airliner to enter full service, the Aérospatiale/BAC Concorde, was a carbon hog of epic proportions,” Golden wrote. 

Golden argued that Biden’s plan for the strain is also absurd. Particularly, it would also become a tempting target for terrorists since it is a lot easier for them than taking down a target in the sky. 

“In other words, President Biden has no idea what your money can buy us or is betting on the fact that, as he sells his not-really-infrastructure infrastructure plan, you’ll have no idea what your money can buy us,” he concluded.