Commuters board a Metrorail train at Union Station in Washington, DC, on March 15, 2016. Metrorail shut down service entirely for emergency inspections of the system’s third-rail power cables after a tunnel fire. (Photo by Mark Wilson/Getty Images)
Commuters board a Metrorail train at Union Station in Washington, DC, on March 15, 2016. Metrorail shut down service entirely for emergency inspections of the system’s third-rail power cables after a tunnel fire. (Photo by Mark Wilson/Getty Images)