John Hopewell Chief International CorrespondentIn June 2019, Colombian artist Doris Salcedo set up an exhibition, Quebrantos, in Bogota’s main Bolivar Square, opposite Colombia’s parliament, and wrote in broken glass the names of 165 activists killed since – not before – Colombia’s peace agreement in 2016. “If we forgot them, if we don’t remember their names, we’re killing them a second time,” she explained.Colombia, Colombians themselves complain, are good at forgetting.