Yarnell Hill

Firefighter Jesus Acosta holds a candle during a vigil and memorial gathering at the Prescott High School in Prescott, Arizona on July 2, 2013. Acosta is a volunteer firefighter with the Ash Fork fire department, which is located in Yavapai County, Arizona. The Yarnell Hill fire, which killed all but one member of a 20-strong 'hotshot' team, was the biggest loss of firefighters' lives since the September 11 attacks, and the most from a US wildfire in 80 years.

Krista Kennell/AFP

Firefighter Jesus Acosta holds a candle during a vigil and memorial gathering in Prescott, Arizona, US, for 19 colleagues who died in the Yarnell Hill fire, a wildfire caused by record heat and erratic winds. The victims were members of an elite “hotshot” unit and was the biggest loss of firefighters’ lives since the September 11 attacks and the most from a US wildfire in 80 years