A C-130J Super Hercules assigned to the 374th Operations Group, leaves propeller tip vortices in its wake as it takes off from Yokota Air Base, Japan, during Col. Barry King's, 374th Operations Group deputy commander, fini-flight, July 23, 2019. Propeller tip vortices, which look like a series of corkscrews, are caused by condensing moisture coming off the tips of propeller as they spin through humid air. (U.S. Air Force photo by Yasuo Osakabe)