U.S. Air Force Senior Airman Jamar Jackson, a United States Air Force Honor Guard ceremonial guardsman, marches in the… https://www.rawpixel.com/image/3317622/free-photo-image-honor-guard-military-uniform-world-warFree Image from public domain licenseGeneral Winfield S. Hancock and Staff of Twenty-Three. Recognized-- General Francis C. Barlow, General David B. Birney… https://www.rawpixel.com/image/8800037/photo-image-vintage-public-domain-peopleFree Image from public domain licenseU.S. Navy Gas Turbine Systems Technician (Mechanical) 1st Class Arthur S. Myo, assigned to Assault Craft Unit 5, secures a… https://www.rawpixel.com/image/8739447/photo-image-public-domain-personFree Image from public domain license