Vice-President Kamala Harris to make first trip to border
US Vice-President Kamala Harris will on Friday make her first trip to the US southern border since taking office.
She has faced questions about why she has not visited the boundary since the White House assigned her in March to address the "root causes" of migration.
The visit was announced a week after former President Donald Trump said he would go to the border on 30 June.
The number of undocumented migrants reaching the US-Mexico border is at the highest level in more than 20 years.
A BBC investigation of...