Nineteen American flags hang on a fence outside of the Granite Mountain Hotshot Fire Station 7 in Prescott, Arizona July 1, 2013. Reinforcements poured in Monday to battle a runaway wildfire which quadrupled in size overnight after killing 19 firefighters in one of the worst such incidents in US history. 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. AFP PHOTO / KRISTA KENNELL (Photo credit should read Krista Kennell/AFP/Getty Images)