Barton Gellman

Stuxnet, a computer worm reportedly developed by the United States and Israel that destroyed Iranian nuclear centrifuges in attacks in 2009 and 2010, is often cited as the most dramatic use of a cyber weapon.

When people said Africa would change me, I didn't understand what they meant. To see the poverty in the townships, for instance, is overwhelming. I found it heart-wrenching to see young children walking barefoot and hungry in the dirt. I'm the kind of person who wants to change the world right here and now, so I got frustrated.

When I - when I was going to school, I knew how to read, write, add and subtract and I - I basically said, 'What else do I need? I'm never going to be able to go to college. I'm not going to be able to afford to go to college. I'm not going to be able to get a scholarship.'