She dug one of the lighters out of a side pocket, but with a sinking stomach, she realized that she didn’t have anything for tinder. Panic rising, she searched the backpack for anything useful. She needed a fire. It wasn’t optional. Her gaze snagged on the bright red bag of Doritos. Her father had used them once in a pinch. The chemicals, powdered flavors, and oil in the chips would burn for several minutes. They were perfect for combustion.