'Hey mom, can you hear me?' Heart-warming moment deaf mother hears 8-year-old son's voice for first time ever after breakthrough surgery

A Texas mother has emerged from more than a decade of silence to hear her eight-year-old son talk for the first time.

Dawn Keim, 43, from El Paso, began losing her hearing 15 years ago due to a debilitating genetic condition. 

The mother-of-three never thought she'd hear her older sons' voices again and, when her youngest child, Asher, was born, she was devastated that she'd never be able to hear him speak.