"Capt. Lovell was the same age as Shackleton, forty-two, when he, too, faced the toughest trial of his life. ... With just fifteen minutes of power left for the life-support systems, the men were forced to abandon ship for the tiny lunar module, beginning an intense four-day struggle to survive. The module was designed to sustain only two men for forty-five hours. The Apollo 13 crew, under the direction of Mission Control in Houston, would have to turn it into a lifeboat that would accommodate three men for twice that time."