John and Lynn are joined in this epsiode of Cool Science Radio by Annie Jacobsen who has written FIRST PLATOON: A Story of Modern War in the Age of Identity Dominance . Jacobsen writes about a platoon in Afghanistan that was unwittingly involved in a shadowy Defense Department program to capture biometrics—fingerprints, iris scans, facial images, and DNA—on 80 percent of Afghanistan’s entire population. This program, born of war, is coming home to America.