By clicking their tongues, a class of blind students learned to walk through a crowded downtown arcade without the help of guides. Daniel Kish, a well-known advocate for echolocation, teaches them how to use sonar to find their way.May 13, 2013
UP NEXT
Pope Francis comforts grieving mother after leaving hospital
00:59
'I'm still shaking': Little Rock residents reflect on destruction in tornado's aftermath
01:32
Florida toddler's body found in alligator's mouth, father charged with murder
01:19
At least one person killed, multiple injured in Illinois roof collapse
00:42
Sanders: ‘Arkansans are tough and we’re resilient’