Donald Trump seeks $18bn to extend border wall over 10 years

The Trump administration has proposed spending $18bn over 10 years to significantly extend the border wall with Mexico, providing one of its most detailed blueprints of how the president hopes to carry out a signature campaign pledge.
The proposal by Customs and Border Protection calls for 316 miles (505 kilometres) of additional barrier by September 2027, bringing total coverage to 970 miles (1,552 kilometres), or nearly half the border, according to a US official.