I was tempting fate to prove a point, and now poor Nadia has paid for it.

And what you don't see in this picture is that somewhere between these riders there, there's a teenager sitting on a rock, saying, "I'm not moving from here. Forget it.

Instead of giving in to grief, depression, defeat in the face of that violence, Mairead hooked up with Betty -- a staunch Protestant and a staunch Catholic -- and they took to the streets to say, "No more violence."

This Arduino project, which I call the Enough Already, will mute the TV anytime any of these over-exposed personalities is mentioned. (Laughter) I'll show you how I made it. (Applause) MB: Check this out.

(Laughter) (Cheers) (Applause) But I felt enough is enough: I'm a scientist, I have a doctorate in astrophysics, I've published in the top journals, in wave-particle interactions, space physics, nucleic acid biochemistry.

♫ We don't need no more trouble ♫ ♫ No more trouble ♫ ♫ We don't need no more trouble ♫ ♫ No more trouble. ♫ Wake up! Everybody wake up. Road block!

You get fed up of steeling yourself to pass by the Saturday night drunks hoping that they won't notice you, and you get fed up of people using their time and energies and talents to campaign against you being treated just like every other citizen.