MONDAY, OCTOBER 29

Cybersecurity: The International Law Section of the District of Columbia Bar and The National Security Law Journal, published by George Mason University School of Law, present “Defending Against Cyber-Intrusions from Both State-Sponsored and Civilian Hackers.” The program begins at 6 p.m. Speakers: Eliana Davidson, deputy general counsel, intelligence, Department of Defense; Michael Hayden, former director, National Security Agency and Central Intelligence Agency; Ronald Lee, partner, Arnold & Porter; Steven Cash, owner and founder, Deck Prism. Location: Arnold & Porter, 555 12th St. N.W. Cost: free, law students; $10, government and nonprofit employees; $15, members of sponsoring sections; $20, nonsection members. Registration and information: (202) 626-3463 or www.dcbar.org.