Washington Headquarters Services Director Regina Meiners (12:15 p.m. EDT); Assistant Secretary of Defense for Energy, Installations, and Environment Brendan Owens (12:25 p.m. EDT); Chief Sustainability Officer and Senior Advisor to the Secretary of Defense for Climate Joe Bryan (12:45 p.m. EDT); and Deputy Assistant Secretary of Defense for Force Education and Training Caroline Baxter (1 p.m. EDT) speak in the Pentagon Center Courtyard at a Pentagon Earth Day celebration. The speakers' remarks will also be livestreamed at dvidshub.net.

Deputy Pentagon Press Secretary Sabrina Singh briefs the media in Airmen's Hall (Pentagon 4th floor, Apex 9/10) at 2 p.m. EDT.  The briefing will also be livestreamed on defense.gov and broadcast on Channel 2 in the Pentagon.