New Colombian right-wing president sworn in

Colombia's new right-wing president has been sworn in and vows to improve the country's security.

Also in today's programme: An appeals court halts the construction of Trump’s $400m White House ballroom; and, one country's new strategy to make tourism more sustainable.

Presenter Julian Worricker is joined by Ella Gilbert, a UK based climate scientist and broadcaster and Michal Ovadek, a lecturer in European politics and policy at University College London.

(Photo: Right-wing De La Espriella is sworn in as Colombia's new president, in Cali. 7 Aug . Credit: Luisa Gonzalez/Reuters)