Today I'm kicking off another new series called "Three Things..." I will do my best to keep these brief and pack in three key points or "ah ha!" moments for the regular and curious GoDC readers. This first one will be about Dulles Airport and I'll list three things that you (probably) don't know about it. We already posted twice about the airport, so you won't be learning about Concorde or the airport's inauguration in 1962. The airport has been serving the Washington region for 50 years now, so it won't be difficult to find three random facts, but it will be challenging to pick the best ones.