During their offensive last week, the Taliban seized US military biometric instruments. The devices, known as HIIDE, for Handheld Interagency Identity Detection Equipment, contain sensitive data like iris scans and fingerprints and were billed as tools to track terrorists. But in the hands of the Taliban, they could now be used to identify Afghans who worked with the coalition forces over the past 20 years. Marco Werman speaks with Welton Chang, chief technology officer at Human Rights First, and former intelligence officer at the Defense Intelligence Agency.