It was July 2006.
Yahoo! had just offered to buy Facebook for $1 billion.
Peter Thiel, Facebook's first outside investor, thought the social network's board of directors should at least consider the offer. But Mark Zuckerberg walked into the board meeting and announced, "Okay, guys, this is just a formality, it shouldn't take more than 10 minutes. We're obviously not going to sell here.'"
