Growing up in the icy isolation of Hibbing, Minn., Dylan, who was still Robert Allen Zimmerman then, found comfort in the country, blues, and early rock 'n' roll that he heard at night on a Louisiana radio station whose signal came in strong and clear.

In the role of Ziggy Stardust, Bowie seemed in 1972 like a strange alien creature, not so much coming from another planet as from a future age. His purpose: to warn us about a dangerous society where values were to be turned inside out.

I was getting calls in 1970 from teenagers, little girls, and they'd say, 'Oh, I like your stories about so-and-so so much. How old are you? 20?' 'No. Older than that.' '30?' 'No. Older than that.' And they'd hang up.

The greatest impact of 'We Are the World' seems to have been the video, which lets us see the singers take their turns at the microphone without any sense of star ego.

At its best, technology can empower people in extraordinary ways.

Energy has become a national security issue and as technology continues to improve, there will be more debates like the one on Keystone.

We need to be a leadership position about protecting minors on the Internet and, more importantly, giving the parents the tools they need to protect them.

Saving the Internet requires a greater sense of shared ownership and fewer bystanders accepting whatever today's Internet has to offer.