Methadone and similar drugs are legal synthetic opioids that are used to help block the cravings and withdrawal symptoms of people trying to wean themselves off prescription painkillers or heroin. Michell Eloy/WABE hide caption

At the height of the Cold War, the FBI and the National Security Agency built a secret tunnel beneath the Russian Embassy (shown here in 2013), so that American spies could eavesdrop on what was happening inside. J. Scott Applewhite/AP hide caption

Barbara Sears, a Republican state representative in Ohio, is not sure whether she likes Trump personally, but she plans to vote for him. Asma Khalid/NPR hide caption

Opponents of a proposed sugary drink tax demonstrate outside City Hall in Philadelphia on June 8. The Philadelphia City Council is set to consider a sugary drink tax that Mayor Jim Kenney wants to pay for universal prekindergarten, community schools and park improvements. Matt Rourke/AP hide caption

Federal Reserve Chair Janet Yellen needs to chart a course for the U.S. economy past Brexit, a potential banking crisis in China and other financial obstacles. Jessica Kourkounis/Getty Images hide caption

A Justice Department study indicates the "Ferguson Effect" may play a role in the rising murder rate in many urban areas. The effect, which refers to the 2014 police shooting death of an unarmed black man in Ferguson, Mo., represents a breakdown in trust between minority communities and police. Scott Olson/Getty Images hide caption