Player Embed Code: Download Embed Share Release of the Department of Defense Zero Trust Overlays Defense.gov June 4, 2024 | 3:04 Les Call, director for the Department of Defense's Zero Trust Portfolio Management Office, discusses the June 4, 2024, release of the Department of Defense Zero Trust Overlays. The overlays are important because they are designed to accelerate implementation of zero trust within the department to better protect DOD networks.