Player Embed Code: Download Embed Share Esper, Milley Testify on the 2021 Defense Budget Posture Defense.gov March 4, 2020 | 02:11:09 Defense Secretary Dr. Mark. T. Esper and Army Gen. Mark A. Milley, chairman of the Joint Chiefs of Staff, testify before the Senate Armed Services Committee, March 4, 2020, to discuss the Defense Department’s 2021 budget request and the Future Years Defense Program.