Thugs in Brazil shot at protesters that demanded the resignation of the corrupt president.

The US finally admitted that bombing one house in Mosul killed more than 100 civilians.

It's impossible to fight a war without mistakes. The US should have admitted the mistake quickly; trying to deny the facts only adds to the wrong.

The US should stop using 500-pound bombs to attack a few people in a roof. And it should stop assuming that a house is empty just because it doesn't know of anyone inside. Those practices invite causing civilian casualties.

The troll is personally responsible for encouraging violence against journalists in the US.

Weak encryption is worse than no encryption, so business operating in countries that don't allow effective encryption should offer no encryption and loudly say why.

The ease of switching from neo-Nazi to Islamist shows that for some people the direction of extremism is just a detail.

The psychology of jihadi radicalization: to counter it, neighbors and media must help young Muslims feel they are welcome as part of the society around them.