15 Minutes is an interview podcast with the biggest names in the global security space. This week, The Cipher Brief celebrates Independence Day by looking back at interviews we did with men who served this country in the Armed Forces. From Robert 'Buzz' Patterson, a former air force pilot and military aide to President Clinton, to Senator John McCain, a former naval pilot and POW, to Jack Keane, a retired four-star general, these men have made important sacrifices for and contributions to national security.