evidence: We are in the midst of the worst drug crisis in U.S. history. The drug is fentanyl, and unlike cocaine and heroin, it's a purely chemical, man-made drug. It's cheap to produce, easily smuggled, and packs an incredibly addictive punch – 50 times more powerful than heroin. Nearly all the fentanyl flooding into the U.S. is made in Mexico by two powerful drug cartels, with chemicals primarily purchased from China. And as you're about to hear, it is frequently hidden in counterfeit pills made to look just like prescription drugs. It's the scourge of our time. Last year more than 70,000 Americans died from fentanyl; that's a higher death toll than U.S. military casualties in Vietnam, Iraq and Afghanistan combined. [...] Three years ago, Anne Milgram – a former attorney general of New Jersey – took over the Drug Enforcement Administration. Since then fentanyl has claimed more than 200,000 American lives, although deaths appear to be leveling off. [...] She started putting pictures of people who died from fentanyl in the lobby of DEA headquarters, a daily reminder of the drug's catastrophic impact.