Three years ago, the sun began to die. In a desperate attempt to reignite the failing star, the United States joined the rest of the planet in unloading its nuclear arsenal at the flickering ember. The missiles burst from silos in Wyoming and Bangladesh, cocooning the earth in tendrils of smoke as they began their two-and-a-half year journey into space. When they finally reach their target, it's thirty degrees in July and getting colder. Lisa and...