Journalist Alan Burdick has spent a long time thinking about TIME, pondering questions like "What is the meaning of Now?" More from his book: "Why Time Flies."
Listen Now: Memorial Service For 19 Firefighters
The memorial service for the 19 Granite Mountain Hotshot firefighters killed in the Yarnell Hill Fire is scheduled to begin at 11 a.m. in Prescott Valley.
Listen to an audio recording of the memorial service:
Listen to audio recordings of some of the speeches from the memorial service:
More coverage of the Yarnell Hill Fire: