"We do not kneel. We will not take a step back," Colombian President Gustavo Petro tells his supporters at a rally on Bolivar Square in Bogota, as he and his family are placed on a US sanctions list. The US Treasury has blacklisted Gustavo Petro, first lady Veronica Alcocer, his eldest son Nicolas, and Interior Minister Armando Benedetti, banning them from travel to the United States and freezing any US assets they hold. The rupture caps months of personal friction between US President Donald