There is a write up about humankind's attempts at flight........in Langley hall...............1st floor Air and Space.........like where CIA hq is......Langley, Virginia..

Leonardo da Vinci and Flight | National Air and Space Museum

https://airandspace.si.edu/stories/editorial/leonardo-da-vinci-and-flight

Aug 22, 2013 - Until the nineteenth century, Leonardo da Vinci was generally known only as ... Boeing Milestones of Flight Hall ... He produced more than 35,000 words and 500 sketches dealing with flying machines, the nature of air, and bird flight. ... However, as far as it is known, none of these inventions were ever built.

Missing: langley ‎| ‎Must include: ‎langley

FLYING MACHINES - Leonardo da Vinci

www.flyingmachines.org/davi.html

Leonardo, born in Vinci, Italy, possessed a genius which went far beyond simply ... He was, perhaps, the first European interested in a practical solution to flight.

Missing: space ‎langley ‎hall

Leonardo da Vinci's Flying Machine Invention

www.da-vinci-inventions.com/flying-machine.aspx

Flying Machine. Of Leonardo da Vinci's many areas of study, perhaps this Renaissance man's favorite was the area of aviation. Da Vinci seemed truly excited by ...

Missing: langley ‎hall