A few years ago, a music producer recorded (audio and video) a street musician singing and playing guitar in Santa Monica. Then he and his crew started traveling around the world, recording other local musicians, playing along with each other, using headphones. I may not be explaining it very well, read all about it on their site:
I'm not involved in the project, I am just a fan. I first saw their story on Bill Moyers' show on PBS. Apparently this month (August) PBS stations nationwide will air their film, "Peace Through Music". Their website has a link so you can search the PBS schedules to see if it's airing on your local station. Check it out.
It's a great idea, with wonderful music by amazing musicians, all playing together from different countries around the world. Uniting the world through music. And what could be wrong with that?