Colombia's former president Alvaro Uribe walks surrounded by security personnel as he greets supporters during a protest march against Colombia's President Juan Manuel Santos and the Colombian peace process, in Medellin. © 2016 Reuters

Colombia's former president Alvaro Uribe walks surrounded by security personnel as he greets supporters during a protest march against Colombia's President Juan Manuel Santos and the Colombian peace process, in Medellin. © 2016 Reuters