Army Gen. Laura J. Richardson, commander, U.S. Southern Command, speaks at 10 a.m. EDT at an Atlantic Council event on security in the Western Hemisphere. Register at atlanticcouncil.org.

Assistant Commandant of the Marine Corps Gen. Christopher J. Mahoney (2 p.m. EDT); and Lt. Gen. Karsten Heckl, commanding general, Marine Corps Combat Development Command, and deputy commandant for Combat Development and Integration (2:50 p.m. EDT), speak at a Defense One digital event on the State of the Marines. Register at defenseone.com.