A billboard challenging Amazon to fully disclose the terms of its $600 million contract to provide cloud computing services for the Central Intelligence Agency has been unveiled at a busy intersection near Amazon's Seattle headquarters.

The billboard's launch — asking "the $600 million question: What's the CIA Doing on Amazon's Cloud?" — marks the escalation of a campaign by the online activist organizations RootsAction.org and ExposeFacts.org. The groups are calling for accountability from Amazon in an effort to inform the public of serious privacy implications of the Amazon-CIA collaboration. (ExposeFacts.org is a project of the Institute for Public Accuracy.)

The positioning of the 48-foot-wide billboard on Amazon's doorstep at Fairview Avenue and Valley Street in Seattle follows a RootsAction petition calling for Amazon founder and CEO Jeff Bezos to make a legally binding commitment to Amazon's commercial customers that it will not provide customer data to the CIA.