In the coming decades one of the biggest threats will be mass migration. 2-3 meter walls are proving to be ineffective. The wall on Turkey's border with Iran, Iraq and Syria haven't done much to stop new waves.
In comparison, look at Greece's new wall along the Turkish border
5 meters tall, reinforced with steel and with barbed wire at the top. This is a real border wall.
What else do you think is necessary for proper border security?
In comparison, look at Greece's new wall along the Turkish border
5 meters tall, reinforced with steel and with barbed wire at the top. This is a real border wall.
What else do you think is necessary for proper border security?