When I was a child growing up in Maine, one of my favorite things to do was to look for sand dollars on the seashores of Maine, because my parents told me it would bring me luck. But you know, these shells, they're hard to find. They're covered in sand. They're difficult to see.

Archaeology holds all the keys to understanding who we are and where we come from.

It's absolutely critical, you know, to train young men and women not just to find sites, but also to protect sites, especially in the wake of the Arab Spring. There's been significant site-looting in Egypt and elsewhere across the Middle East.

WorldView-3 goes into the mid-infrared wavelength, allowing you to see very subtle geological differences on the sites at a 0.4-metre resolution.

Let me start with Yahoo. As we meet today, a Chinese citizen who had the courage to speak his mind on the Internet is in prison because Yahoo chose to share his name and address with the Chinese Government.

Technology is improving to prevent musicians from losing their hearing while performing on stage... audience members losing their hearing from listening to loud music… people being able to experience music not just with their ears, but with touch or with through their eyes."

The world is enormously dangerous and scary. I worry very much for my daughter. I'm not sure we're in control any more, and I think the Internet is partly responsible for that.

I had become obsessed with the control-freak aspect of photography and with the rising importance of the image in our social media age it ended up working.