The new and ever-changing world of social networking has blurred the lines between private and public, work and personal, friend and stranger. It's becoming a particular challenge for teachers who can quickly rile students and parents by posting comments or photos online.
In some cases, teachers have been fired for statements they've made on Facebook, which is raising free speech issues.
This summer, NPR told the story of a young man in Syria who worked a regular job by day and was a protester by night. At the end of that story, the activist made a prediction that was later tweeted to thousands of people: "One day my time is coming. Until the world realizes what's happening in Syria, they will try and get us all."
As the Egyptian elections roll on over the course of several more weeks, the incoming parliament looks likely to be dominated by Islamists. But the two leading Islamist blocs have little in common and are doing their best to undermine each other.
The Muslim Brotherhood and Salafists do not get along in Alexandria's working-class slum of Abu Suleiman. Outside one polling station, the tension is thick as campaign workers for each group's political party hand out fliers.
For much of the Cold War, George F. Kennan was America's best-known diplomat and a leading Soviet scholar. His reputation was based in large part on the 1947 essay he wrote on containment, the Cold War policy that said the U.S. should neither forcefully confront nor meekly appease the Soviets.
Rather, the U.S. should seek to contain Soviet expansion, power and influence in the belief that the communist system would eventually collapse on its own. The U.S. largely adhered to Kennan's road map until the Soviet Union crumbled in 1991.