Facebook and other tech companies have been critical of the government for much of the past year for allowing the NSA’s spying efforts online to continue. Facebook has repeatedly pressured the government to allow them to release information to the public about the spying program, claiming that the lack of transparency has hurt the public’s trust in the site. This week, Mark Zuckerberg again stepped up pressure on the government for the spying scandal, this time by publishing an open letter.

“We work together to create this secure environment and make our shared space even better for the world,” Zuckerberg wrote. “This is why I’ve been so confused and frustrated by the repeated reports of the behavior of the U.S. government. When our engineers work tirelessly to improve security, we imagine we’re protecting you against criminals, not our own government. The U.S. government should be the champion for the Internet, not a threat. They need to be much more transparent about what they’re doing, or otherwise people will believe the worst.”

The original documents detailing the NSA’s spy program alleged that the government had direct access to Facebook’s servers, though the site denied that. The full story has not yet emerged about what kind of access the government has to Facebook’s data, but to the site’s credit, they’re trying to ensure the public eventually finds out.