On a cloudless March evening at NASA’s Kennedy Space Center, a 322-foot rocket emerged from the building where it was stitched together. The gigantic orange-and-white vehicle, known as the Space Launch System, was making its public debut, fully assembled for a series of final tests before being cleared to fly. Attached to a support tower and riding on a transport vehicle, it inched toward the launch pad along a 4.2-mile path paved with river rocks. But suddenly, the procession shuddered to a halt.
Was something amiss? Had there been a mechanical issue? The standstill stretched for more than half an hour. As if sensing some mortal flaw in this newly hatched bird, vultures began to circle overhead.
Soon I realized the scavengers were simply riding the hot air rising off the sunbaked roof of the Vehicle Assembly Building, a 576-foot monolith where not only SLS, but the Apollo program’s Saturn V rocket and the winged space shuttle came together. Eventually SLS continued on its way, unperturbed. There were no grim omens—just ways to reach greater heights.