Bids for President Trump’s proposed wall along the southern border are due on Wednesday, and more than 600 companies have placed bids, reports CBS News correspondent David Begnaud.

David Begnaud reports from the border fence CBS News

The border is almost 2,000 miles long, with fencing in place along 654 miles; Those projects cost $2.3 billion.

Mr. Trump wants the wall to be 30 feet high, twice as tall as current fencing, and aesthetically pleasing.

Watch the video above for more of Begnaud’s reporting from the border in McAllen, Texas, including Mr. Trump’s other specifications for the wall and how much it might cost.