Two years before 9/11, Michael Hayden took the top job at the National Security Agency. He spent the next decade at the top of the nation's intelligence structure and presided over a data-collection revolution.
Hayden's a security consultant now, and he'll be speaking in Dallas at noon Tuesday: It's part of the University of North Texas' Kuehne Speaker Series on National Security. (Tuesday's speech is sold out.) He took a break in his busy international travel schedule for this week's Friday Conversation.