How Deadly Is Fentanyl?

Former DEA director of special operations Derek Maltz is now an advocate for families who have lost loved ones to opioid overdoses. He tells Sara he is begging the government and schools to educate kids and parents about how deadly just one pill can be. He also discusses the huge threat posed by fentanyl and the microscopic amount of it that can be fatal. Maltz also explains why he sees fentanyl as a weapon of mass destruction.