But Facebook, which celebrates its seventh...

But Facebook, which celebrates its seventh birthday Friday and has more than a half-billion users worldwide, is not eagerly embracing its role as the insurrectionists’ instrument of choice. Its strategy contrasts with rivals Google and Twitter, which actively helped opposition leaders communicate after the Egyptian government shut down Internet access.

The Silicon Valley giant, whether it likes it or not, has been thrust like never before into a sensitive global political moment that pits the company’s need for an open Internet against concerns that autocratic regimes could limit use of the site or shut it down altogether.

Cecilia Kang and Ian Shapira, Washington Post, Facebook treads carefully after its vital role in Egypt’s anti-Mubarak protests.