Health worker Nathan Fields (left), Rep. Donna Edwards and Dr. Leana Wen show people how to use naloxone on a street corner in Sandtown, a Baltimore neighborhood where drug activity is common.
Cris and Valerie Fiore hold one of their favorite pictures of their sons Anthony (with the dark hair) and Nick. Anthony died from a heroin overdose in May 2014 at the age of 24. Cris Fiore's eulogy described his son's death as a shock, but "not a surprise." Anthony had been addicted to heroin for years.
This genetically modified yeast can convert sugar into powerful opioid drugs. Scientists working with the modified yeast strains are required to register them with the Drug Enforcement Administration and keep the yeast under lock and key.
Courtesy of Christina Smolke/Stanford University
A Bulgarian border policeman stands near a barbed wire wall on the border with Turkey in July 2014. Experts believe that about two-thirds of the heroin that enters Europe comes through Bulgaria, and that a third of that moves on to the United States.
Dimitar Dilkoff/AFP/Getty Images
Sabas Sanchez Jr. was better known among his neighbors in Madison, Neb., as "Gordo" — Spanish for chubby. He also had an oversized personality. His father keeps this tattered photo in his wallet.
Bobby Caina Calvan/Heartland Reporting Project