On 11 September, I was living in Greenwich Village, New York; my children learned to tell south from north by looking at the World Trade Center.

Money isn't always the best motivator. If you leave a $50 check after dinner with friends, you don't increase the probability of being invited back.

Seeing Anonymous primarily as a cybersecurity threat is like analyzing the breadth of the antiwar movement and 1960s counterculture by focusing only on the Weathermen.

Like crime, terrorism is a fact of life. I grew up in Israel, where every unattended bag was a suspected bomb; when my family moved for a few years, it was to London in the early years of the Troubles.

On 11 September, I was living in Greenwich Village, New York; my children learned to tell south from north by looking at the World Trade Center.

Bringing an end to mass government surveillance needs to be a central pillar of returning to the principles we have put in jeopardy in the early 21st century.

We suffered a terrible blow on 11 September 2001. We responded with fear and anger. A fight-or-flight response is adaptive in any species. For us, given our power, fight was the only response we could imagine.