“Blame it on the water,” said the dying man from his hospital bed, all alone. Everyone else had died, even the nurses and the doctors. The communication channel wasn’t working properly, because there was no one to adjust it. “Can you hear us?” asked Control back on Earth. The man couldn’t, but he kept on talking until the very end. The water had been contaminated during the unscheduled visit of an alien peace envoy. They’d have their peace... A human peace envoy would take them the most precious treasure, water. Even aliens needed water. And they drank it, the fools.