How to Prevent Future Intelligence Leaks

I’ll never have a better job than I did in 2002.

A reserve military intelligence officer who’d just started as a Wall Street law firm associate, I volunteered to return to active duty on September 12, 2001, furious at the attack on my hometown and murder of boyhood friends. Through the kindness of a sympathetic Fordham Law School connection, I obtained a prize assignment to the Joint Staff Directorate of Intelligence to do counterterrorism work.

My duty was to brief the director of intelligence (or “J2”) on terrorism issues at...