Learn how Joplin Tornado Info started a national revolution in the use of social media during disaster recovery.It used to be that in the event of a natural disaster, people would tune in their radios. That may still hold true, but a newer form of technology proved a fruitful means of disseminating information after an EF-5 tornado hit Joplin, Mo. in May of 2011 and an EF-2 tornado skated across Branson on Feb. 29, 2012. Both events had something...