Farc Contests Colombian Elections For First Time

Colombia's Farc Marxist guerrillas have contested elections for the first time, having laid down their arms, but their presence on the ballot is hugely controversial.

Also in the programme: China has removed its presidential two-term limit, but what caused the United States to introduce legislation in 1947 preventing presidents from serving more than two terms? And can robots learn to understand the niceties of social interaction?

(Photo: Ivan Marquez of the political party of the Farccasts his vote during the legislative elections in Bogota, Colombia 11 March 2018. Credit: Jaime Saldarriaga/Reuters)