Fuente : Washington Post, by Sarah Cahlan, Drea Cornejo, Anthony Faiola, Elyse Samuels and Steven Grattan May 20, 2021 Joan Nicolás García Guerrero was mourning the fallen from Colombia’s worst bout of civil unrest in years. Then, the candlelight vigil that the 26-year-old artist and father was attending in the city of Cali descended into chaos — a scene captured, like so much of the Colombian violence, by amateur video. García Guerrero, a front-line protester, had expressed a willingness to give his life for the cause. “Mother,” he had written in a text to his family on April 28, the day the...