Logo for the US National Security Administration's PRISM programme.
Many questions about privacy and government secrecy have been raised since Edward Snowden leaked details on a US government surveillance programme called PRISM . Other concerns, however, were more aesthetic: What's with that logo?
It turns out the image used by the US National Security Administration (NSA) for PRISM was taken from a British photographer's personal collection. Here's the original photo by Adam Hart-Davis: