* "Fear is an extremely potent motivating force, overwhelming all reason and skepticism of power. That's why political leaders - in all eras and all places - like it and use it so much."
* A reporter reflects on leaving behind five years in Bagdhad.
* Good Q&A on understanding Arizona's immigration law.
* Iran rejects the mullet as un-Islamic.
* Challenging how law enforcement handles autism.
* Greta Christina on how sexism affects men.
* Ancient stone tools uncovered in Britain push back theories on when humans first arrives there.
* The Explainer, on how squirrels beat the heat.
* The 2010 Emmy nominees have been released. Here's who got left out.