The short answer:
Emily tried to view Rachel's profile picture, but all she could see was a blurred image with a message saying "This content is not available." Emily was intrigued and wanted to see the picture. She began searching online for a way to view private Facebook profile pictures. fb private profile picture viewer online
Even if a profile is "locked," the profile picture itself is technically public data; these tools simply find the link to the high-resolution file that Facebook hides from the standard user interface. The short answer: Emily tried to view Rachel's