my link for the white pages does not work

Hi, Ansakhan! Welcome to the course! Can you let me know which whitepaper link you are trying to access? I’ve checked the links for the "Overview of Amazon Web Services" whitepaper and those appear to be working. If this is the whitepaper you’re looking for, the direct link is https://docs.aws.amazon.com/whitepapers/latest/aws-overview/aws-overview.pdf. The direct links can also be found in the "Understanding Cloud Computing" lesson in the resources section and from within the interactive diagram.