Host Sonya Gavankar and exhibits writer Ellie Stanton explorethe stories and the artifacts in the Newseum’s FBI exhibit. Today’sepisode: How FBI investigators at the Terrorist Explosive DeviceAnalytical Center (TEDAC) examine improvised explosive devices(IEDs) — the weapons of choice for terrorists — to identifybomb-makers by the “signatures” they leave behind. TEDAC’s “bomblibrary” holds more than 100,000 IEDs found in war zones and crimescenes and has identified more than 1,000 people with potentialterrorist ties.