Player Embed Code: <iframe width='500' height='300' scrolling='no' frameborder='0' style='border: none; overflow: hidden; width: 500px; height: 300px;' allowtransparency='true' src='https://www.dvidshub.net/video/embed/712203'></iframe> Download Embed Share Milley Takes Office as 20th Chairman of the Joint Chiefs of Staff Defense.gov Sept. 30, 2019 | 01:26:14 President Donald J. Trump and Defense Secretary Dr. Mark T. Esper host an armed forces welcome ceremony in honor of Army Gen. Mark A. Milley, 20th chairman of the Joint Chiefs of Staff, at Summerall Field, Joint Base Myer-Henderson Hall, Va., Sept. 30, 2019.