Colombian president Juan Manuel Santos and the Farc head Rodrigo Londoño Echeverri, aka Timoleón Jiménez or Timochenko, shake hands during the second signing of the historic peace agreement between the Colombian government and the Farc, in Bogota, Colombia. Photograph: Luis Robayo/AFP/Getty Images

Colombia’s government has signed a revised peace accord with Marxist rebels to formally end five decades of civil war, a month after voters narrowly r(...)