SALEH: One of the ideas that we're still trying to trace where it had originated was -- is the idea to go to popular areas and bring people from the popular areas to specific public squares.
AMANPOUR: After a week of protests, the Mubarak regime shut down the Internet. Wael was arrested, but he had already made a plan to preserve the online movement.
SALEH: In case he disappears or anything, I should take over the page. If he's arrested, it's very expected that he would be investigated and tortured. So if the page had stopped working at the time, that would be sort of incriminating for him.
AMANPOUR: Half a world away, Nadine had set up a makeshift war room in a D.C. townhouse.
WAHAB: When the Internet went down is when my world sort of turned topsy-turvy. It became surreal.
AMANPOUR: They were determined to keep the page up and running.
WAHAB: People would tell me, "Nadine, they're not going to come for you here." But I was terrified. When I was at night by myself, I was terrified.
AMANPOUR: At the same time in Cairo, Ahmed also continued the work Wael had started. SALEH: When I wake up early in the morning, I post five or six posts or as many as I could in very short time, couple of hours, and then I post one sentence that says, "I'm going to Tahrir."
AMANPOUR: But even they were stunned when Wael was released and Hosni Mubarak stepped aside.
GHONIM: I'm proud to be an Egyptian since I've seen all these, you know, heroes in the street doing all these things that I never thought Egyptians would do. And, you know -- you know, in -- in 15 days, Egyptians learned what does it mean to me to involve in politics and call for their rights.
AMANPOUR: That moment emboldened a movement across the Middle East, filled with young people who now believe they can break the grip of repressive regimes, armed with something as simple as a cell phone.
(on-screen): How wired is the whole region?
GHOSH: It's quite substantially wired. Even people who you would say are quite poor, live in the old city and 20 people to a small home, they have a cell phone that -- it'll have a camera. If they can afford it, it'll have sort of e-mail service or an Internet connection.
AMANPOUR (voice-over): In Bahrain, the protesters in Pearl Square have makeshift charging stations for that vital weapon against oppression.
(UNKNOWN): It plays a big role, OK, in gathering people and giving them instructions. Go here. Not go. Don't go there. OK, this place is dangerous. Don't try to attack policemen.
AMANPOUR: In Yemen, Allah Jaban (ph) is helping to mobilize young people by posting a few simple photos on Facebook.
(UNKNOWN): Those people who go out and demonstrate, they're young people, out there just to -- to ask the better for their countries and ask for their rights.
AMANPOUR: Thousands turned out and forced their president, Ali Abdullah Saleh, to take back his plan to make himself president for life. Watching this wave reach its borders, Saudi Arabia is desperately trying to contain it. It set up a Facebook page where the chief of the royal court encourages you to post your complaint directly. And if you fax it in, they guarantee a response within 24 hours.
In Iran, despite the government's attempts to block it, 90 percent of the hits on this Facebook page still come from Iran.
(on-screen): The people who are doing this, are these people who are friendly to the United States?