AZ Honors Firefighters on 5-Year Anniv.

PRESCOTT, Ariz. (AP) -- Saturday marks five years since 19 wildland firefighters died in Arizona.

Prescott is honoring the men with bell tolls and by reading each of their names. A service also will be held earlier in the day at the cemetery where some of them are buried.

Most of the Granite Mountain Hotshots died June 30, 2013, after becoming trapped in a brush-choked canyon in Yarnell, about 90 miles (145 kilometers) northwest of Phoenix.

It was the deadliest day for firefighters since the Sept. 11, 2001, terrorist attacks.

Since then, memorials have been built around town. Families have created foundations to honor the men's work. Books and a movie have been released.

Only one of the crew members survived. Brendan McDonough was serving as a lookout.

Investigators never determined exactly what led to the men's deaths.