“Helen,” Ling said, not looking up from her monitors or slowing her frantic typing. “Get ready to throw the kill switch.”

Helen nodded, placing her hand over the red switch. Then she added, “Ready,” realizing no one was watching to see the nod. Her hand stood over it, sweating and starting to tremble. She shook the hand, trying to lose the tremble, and replaced it over the red kill switch, this time steady. She stared at Ling and the others working frantically to get her dart home safely, waiting for the signal that said Sprite was back, flip the switch.