I would say SHIELD is an "open" secret. Seems to me like everyone knows it's there but no one quite knows what it does. I am pretty excited to see what Marvel has in store for us in the upcoming movies. Which makes me realize that I really need to try and find "Civil War" quick, so I am up to date. I actually really like this website because it sure helps with it. My husband started me on those movies since he's been reading Captain American since he was a little kid and I have to say I actually enjoy them now