U.S. Air Force F-16 fighter jets fly over the Osan U.S. Air Base during a combined air force exercise with the United States and South Korea in Pyeongtaek, South Korea, Dec. 4, 2017. The U.S. has once again buckled under pressure from European allies and Ukraine's leaders and agreed to provide more sophisticated weapons to the war effort. This time it's all about F-16 fighter jets. (AP Photo/Ahn Young-joon, File)
Featured Photo Galleries
