Venezuela crisis: Guaidó says military force still an option

Opposition leader Juan Guaidó tells BBC Newshour that outside military force remains an option, after the failure of past efforts to remove President Nicolás Maduro from power.

Also in the programme: Republicans and Democrats clash over funding for migrant detention centres on the US / Mexico border; and a record heatwave strikes Europe prompting questions about climate change.

Photo: Venezuela's opposition leader Juan Guaidó. Credit: BBC.