From left, Dr. Tom Jenkins, president of MetroLaser, Inc., and Regis Morgan, senior engineer with MetroLaser, observe the visual display of data during a test of the company's setup to non-invasively measure the unsteady, 3D velocity field of a jet plume from a stationary aircraft engine, Nov. 18, 2021, at the Propulsion Research Facility operated by Arnold Engineering Development Complex on the campus of the University of Tennessee Space Institute in Tullahoma, Tenn. The technology was being tested on a General Electric J85. (U.S. Air Force photo by Jill Pickett)