Ancient Aliens, Founding of America, Washington, D.C.?

What is the meaning behind secret messages found throughout Washington, D.C.? Did America's Founding Fathers know something about ancient aliens that the general public did not? And if so, could this knowledge have been incorporated into the symbols, architecture, and even the founding documents of the United States of America? Hor those of you unfamiliar with this series it is most definitely worth a look and listem, then filter it through your perceptions...