The US Air Force conducted its first so-called "elephant walk" drill using F-35 fighter jets Monday, launching dozens of aircraft in a condensed period as part of what the service called a "combat power exercise" at Hill Air Force Base in Utah.
원문출처 : https://www.cnn.com/2018/11/20/politics/us-air-force-f-35-elephant-walk/index.html
원문출처 : https://www.cnn.com/2018/11/20/politics/us-air-force-f-35-elephant-walk/index.html