Prometheus brushed a speck off his tux lapel. "Understand, Percy. You are re-fighting the Trojan War here. Patterns repeat themselves in history. They reappear just as monsters do. A great siege. Two armies. The only difference is, this time you are defending. You are Troy. And you know what happened to the Trojans, don't you?"
"So you're going to cram a wooden horse into the elevator at the Empire State Building?" I asked. "Good luck."
The Last Olympian (Percy Jackson and the Olympians, Book 5), by Rick Riordan