Why did Facebook air live video of the New Zealand mosque shooting for 17 minutes? Didn't anyone alert the company while it was happening? Facebook says no. According to its deputy general counsel, Chris Sonderby, none of the 200 or so people who watched the live video flagged it to moderators. In a Tuesday blog post, Sonderby said the first user report didn't come until 12 minutes after the broadcast ended. "When we see things through our phones, we imagine that they are like a television show," said Siva Vaidhyanathan, a professor of media studies at the University of Virginia. "They ar...