Opposition demonstrators and riot police clash during a protest against President Nicolas Maduro in Caracas, on July 6, 2017. A political and economic crisis in the oil-producing country has spawned often violent demonstrations by protesters demanding Maduro's resignation and new elections. The unrest has left 91 people dead since April 1. / AFP PHOTO / JUAN BARRETO (Photo credit should read JUAN BARRETO/AFP/Getty Images)
