President Trump has elaborated further on his plan to build a border wall between the US and Mexico.
Speaking to journalists aboard a flight on Air Force One, the president said the wall should be transparent and could be almost 1,500km long. According to press reports, Trump envisions "anywhere from 700 to 900 miles (1,100 to 1,500km)" of fortification to secure the border".
He also said that the wall "needs transparency … you have to be able to see through it" because "as horrible as it sounds, when they throw the large sacks of drugs over, and if you have people on the other side of the wall, you don’t see them. They hit you on the head with 60 pounds (27kg) of stuff? It’s over".
There are currently 650 miles (1,000km) of border walls and fences in place. The border between the US and Mexico is 3,200km long but Trump has said the entire border does not have to be fenced because "you have a lot of natural barriers".
It is unknown when construction work will begin on the wall or when it is due to be completed, but the Department of Homeland Security plans to build prototypes this summer.
The cost of the project is also up in the air, with estimates predicting a price tag of over $21bn.
Image: Border fence between Tijuana, Mexico, on the right, and the US near San Diego on the left (Gordon Hyde/Wikimedia Commons)