Key locations of a 3000+ km border? Please realize the wall is just a political slogan. It will never be seriously built because it's insanely expensive, and no

Key locations of a 3000+ km border? Please realize the wall is just a political slogan. It will never be seriously built because it's insanely expensive, and no matter how many km you manage to save, it will be very big and very hard to guard. Ironically, you might not need it since Trump and AMLO (the Mexican president) agreed for Mexico to stop the influx of migrants with its own resources. In a sense, we built the wall and are paying for it, by becoming the wall itself.