Fewer Salvadorans are being apprehended at the border

 President Donald Trump keeps threatening to cut aid to El Salvador, Honduras and Guatemala for not doing enough to stem the flow of migrants north to the US border. But the flow from El Salvador has already declined significantly in the last two years, according to both US and Salvadoran governments. Oscar Chacón, executive director of Alianza Americas, helps Host Marco Werman make sense of the numbers.