Blind U.S. Army vet runs with the bulls in Spain
In our series, Pushing the Limits, we introduce you to an especially brave runner taking part in this year's running of the bulls festival in Spain. More than 2,000 people ran Monday in the famous and dangerous annual event in Pamplona. Retired U.S. Army Maj. Ivan Castro is taking this high-risk tradition to a new level. Jonathan Vigliotti reports.