”  Other microprinting over the plane incorporates “X-1” within the horizontal stabilizer of the plane as well as a horizontal row of a few “USPS” letters symbolizing the plane’s pitot tube. He said, https://berthacstk331123.activosblog.com/29253040/the-smart-trick-of-chuck-yeager-s-supersonic-plane-that-no-one-is-discussing