08/07/2013 11:30 am ET Updated Aug 07, 2013

Brendan McDonough, Lone Survivor Of Arizona Wildfire, Speaks About Loss (VIDEO)

On June 30, 19 men were killed as out-of-control wildfires swept across an Arizona mountainside. They were all part of the Granite City Hotshots firefighting team from nearby Prescott, AZ, of which 21-year-old Brendan McDonough was the sole survivor. He had been stationed as a lookout that day, and was a half mile from his crew when disaster struck.

On Wednesday morning, McDonough gave his first interview since the tragedy to ABC's Good Morning America.

"I asked myself a million times 'why am I sitting here and why aren't they sitting here with me?'" said McDonough.

"I was still with our vehicles, in one of the buggies, and I could hear--whoever didn't bring their phones, I could hear phones ringing, knowing that it was their wives, their family. I sunk. I sunk into my seat, I sunk into myself. I couldn't think."

Watch the interview above.