U.S. Air Force Senior Airman Henry Lowry and Airman 1st Class Emmanuel Estebat, 1st Combat Communications Squadron radio frequency transmission system technicians, secure a guideline for a blue sky mast system during Noble Skywave at U.S. Army Garrison Baumholder, Germany, Oct. 26, 2022. Noble Skywave is a global contest that sharpens the high-frequency radio skills of participants while also increasing interoperability amongst U.S. allies and partners. (U.S. Air Force photo by Airman 1st Class Jared Lovett)