Saudi Arabia is building a 'Great Wall' to keep ISIS out

Saudi Arabia is building a 600-mile barrier along its northern border with Iraq, in an attempt to keep ISIS militants out of the country.

Construction for the so-called "Great Wall" began in September, and the border now has five layers of fencing, complete with watchtowers, night-vision cameras, and radar cameras, The Telegraph reports. The wall will also have seven command and control centers that can detect aircraft and vehicles as many as 22 miles away.

ISIS has previously expressed its desire to overtake Mecca and Medina, Muslim holy cities that are in Saudi territory. This week, two Saudi border guards and their commanding officer were killed by ISIS on the Saudi-Iraq border.

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