For decades the same test has been used to convict drunken drivers, but, defense lawyers argue, science has yet to prove that flunking the standard field sobriety test actually means that a person is high, the way its been proven to measure drunkenness. Pedro Vera/Getty Images/EyeEm hide caption
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An Afghan detainee is held at the Parwan detention facility near Bagram Air Field in Afghanistan in 2011. A document circulating in Washington suggests the Trump administration might reactivate secret CIA "black sites" for terror detainees around the world. Dar Yasin/AP hide caption
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A worker stands in a construction project in a favela, or shantytown, in Rio de Janeiro, Brazil. The government has helped drive down income inequality by investing in basic services like health care, education and pensions. Mario Tama/Getty Images hide caption