The Sept. 9, 2010, PG&E pipeline explosion that reduced San Bruno, California, to smoke and rumble will remain vivid in the hearts and minds of the community's residents. The incident left eight dead, 58 injured and affected 108 homes. The earth-scarring explosion that had taken so much from those residents provides a terrible lesson to be learned in identifying latent hazards and making organizational choices. As much as we can point out negligence and the folly of "run-to-failure" attitudes in this tragic accident, we must feed our motivation to discover and act on those latent conditions, known and unknown, that lead to errors and unsafe situations. This is a learning culture that we are trying to further foster within NASA.