”  Other microprinting around the plane incorporates “X-1” on the horizontal stabilizer of the plane in addition to a horizontal row of 3 “USPS” letters representing the plane’s pitot tube. if you're https://nellogys456908.blogdanica.com/29803289/not-known-facts-about-the-first-supersonic-plane-in-the-us-by-chuck-yeager