During periods of unusually high usage, Google Scholar may begin asking AFRL customers to fill out a reCAPTCHA widget to prove they're not robots. Unfortunately, there is a security bug in this widget that may result in "Invalid domain for site key" errors for customers who are using the Library's EZproxy service.
If you run into this error when trying to access full-text articles in Google Scholar, there is a way to work around it:
Workaround: If you have your own personal Google account, link it to the Library: