When you're dealing [music] with something as complex as building a rocket or as building a launchpad, being extremely mindful of the critical path is important. And what the critical path is is the longest set of sequential events that are gated by each other that must be completed in order for a task to happen. >> Test flight affairs on LP-0. We're getting ready for our pre-op brief for flight 12 here. We're going to start off with some comp protocol. T-minus 1 minute. >> When we see an unexpected respons ...