Salvatore Iaconesi: What happened when I open-sourced my brain cancer

When artist Salvatore Iaconesi was diagnosed with brain cancer, he refused to be a passive patient -- which, he points out, means one who waits. So he hacked his brain scans, posted them online, and invited a global community to pitch in on a cure. This sometimes meant medical advice, and it sometimes meant art, music, emotional support -- from more than half a million people.