Abuse and neglect of Arizona's most vulnerable can happen anywhere.
Ash uncovered at Lake Mead could help the Southwest prep for future volcanic events

Dropping water levels in Lake Mead have revealed a number of interesting things, from sunken boats to bodies in barrels.
But scientists have also noticed rocks covered in a layer of volcanic ash up to 12 million years old.
And as Gene Smith explains, that’s not just a history lesson — it also has meaning for the future.
Smith is a professor emeritus at the University of Nevada, Las Vegas, where he’s a geochemist and volcanologist.
The Show spoke with him to learn scientifically, how big of a find this is.