Trump's wall won't work as expected, or even be build. Here's why:
A historical example of a wall not working is the "Berliner Mauer". From 1961 until 1989 a wall divided East and West Berlin. Sure, it's only a small scale model compared to Trump's wall, but the Mexico Wall would be even harder to defend than the Berlin Wall. Between 136 and 245 people crossing from the GDR to the West Germany were shot, but statistics and contemporary witnesses say, many more people crossed the wall by simply digging a tunnel under it. The same thing would happen in Mexico
The wall won't stop planes from crossing the border. About half of the Mexican immigrants in the USA came by plane and just overstayed their visa. If half the immigrants didn't even need to cross the wall, why shouldn't all of them take a plane after the wall is built?
The wall would cost the US about 25,000,000,000 US dollars. This is more than the yearly budget of NASA, they spent 19,300,000,000 US dollars. And Mexico won't just pay the US 25 billion USD. But who pays the 25 billion if not Mexico? That's right, the US citizens.
So the wall wouldn't just be virtually impossible to build, it would cost a humongous amount of money and also won't work particularly well at keeping the Mexicans out of the US
I hope you liked this article. As always, do your own research. This should just encourage you to educate yourself on the topic.