Building at main airfield: Unable to walk under a section.
https://gyazo.com/bce3277cd747987811ce9fb058de1ad0
https://gyazo.com/9bad5f45fa79f19b0fbddc8d0e575f6c
https://gyazo.com/ec08d3d371a11f5d23dfe3dc2ffb7738
https://gyazo.com/a638defb74603d134655470be95fd365
Should explain it all :)