DONALD TRUMP: You know, interestingly, the wall on southern border, it's - really, if you think it's 1,000 miles but it's 2,000 miles, but a lot of it - some of it's done - it's done poorly by the way, what they have done is very poor, very poor work, a very poor job, and very -- not much of a wall. But you also have natural terrain which is automatically a barrier, which is a good thing. So you're talking about 1,000. And then you look at the Great Wall of China that was built 2,500 years ago. It's 13,000 miles. And we're really talking about something more than a little more than 1,000 miles. So it is something that can be absolutely done, not done at tremendous cost. You know, it's been costed by politicians and they came out with these outrageous numbers.