They still protest twice a week, and the army allows it, wary of a bloody confrontation. So Algeria’s still-bloodless revolution continues.

The Nigerian president directed the military to hunt down the perpetrators of the attack, which local officials tied to the Islamist extremist group Boko Haram.

Renee Holland sent her Facebook friend thousands of dollars. She became entwined in a global fraud that the social network and the United States military appear helpless to stop.

Here’s how victims are hooked, and what Facebook and the United States military say they can (and cannot) do about it.