"You already know most of the people," he said, "but this, for instance"—and he raised his hand toward the camera—"is due to the network." He did something that replaced his selfie feed with one from the top of the stairs, overlooking the broad floor below, under sunlight through blue tarps. Cables everywhere, helmeted climbers dangling. More workers than she’d seen here before. Lengths of glittering white fabric were being hauled up by electric winches.