Iran Again Blocks Access to Facebook, Twitter

Iranians had a few hours access to Facebook and Twitter before a Web firewall went back up and Tehran scotched talk of new Internet freedoms by blaming a technical glitch for the brief opening of access. Several people in Iran found they could log in to their accounts on the U.S.-based social media sites without using techniques to circumvent blocks on Twitter and Facebook that the state imposed four years ago, during a clampdown on the biggest protests since the Islamic revolution.