After Mass Shootings, Americans Ask ‘Why?’

Americans are coping with the aftermath of three mass shootings in a week that killed nine in Dayton, Ohio on Sunday, 20 in El Paso, Texas, Saturday, and three in Gilroy, California on July 28th.  In each incident, there were multiple injuries, some of them critical.  Mike O’Sullivan reports, people are asking what motivated the killers and what can be done stop the violence.