A NASA aircraft had to make a "gear-up landing" in Houston on Tuesday due to a mechanical problem, NASA spokesperson Bethany Stevens noted in a post on X. "Today, a mechanical issue with one of NASA’s WB-57s resulted in a gear-up landing at Ellington Field. NASA operates three WB-57 aircraft; the one involved in today’s incident carries tail number NASA927. These aircraft will provide imagery during key mission phases, including launch, entry, and splashdown," her post noted. "The NASA Johnson Space Center (JSC) in Houston, Texas is the home of the NASA WB-57 High Altitude Research Program," the site notes.