A: Dallas, Texas, United States
In November 1994 a Rolling Stones concert with 50,000 fans at the Cotton Bowl in Dallas, Texas, became the "first cyberspace multicast concert" over Internet radio. Mick Jagger opened the concert by saying, "I wanna say a special welcome to everyone that's, uh, climbed into the Internet tonight and, uh, has got into the Mbone. And I hope it doesn't all collapse" (quoted from the Wikipedia article on Internet radio, accessed 03-18-2012).