How Egypt Turned Off The Internet

Yesterday, something unprecedented happened: Egypt turned off the internet. A nation of 80,000,000 instantly disconnected. So how'd they do it?
There was no giant lever or big red button involved, but in reality it was almost as easy: the Egyptian Government simply issued an order for ISPs to shut down service.
"Under Egyptian legislation the authorities have the right to issue such an order and we are obliged to comply with it," Vodafone Egypt explained in a statement shortly after. Along with Vodafone, Egypt's other three major ISPs, Link Egypt, Telecom Egypt, and Etisalat Misr, all stopped service. 
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