A U.S. Navy destroyer stops four Mexicans in a row boat rowing towards California. The captain gets on the loud-hailer and shouts, "Ahoy, small craft. Where are you headed?"
One of the Mexicans puts down his oar, stands up, and replies, "We are invading the United States of America to reclaim the territory taken by the USA during the 1800s."
The entire crew of the destroyer doubled-over in laughter. When the captain was finally able to catch his breath, he gets back on the loud-hailer and asks, "Just the four of you?"
The same Mexican stands up again and shouts, "No, we're the last four. The rest are already there!"