11 Years Later, We Finally Know What’s in a National Security Letter (It’s Bad) Prison Planet.com Posted on December 2, 2015 Posted in Aggregated No Comments Tagged with Prison Planet Liberty Blitzkrieg | Back in 2004, Nicholas Merrill, who was then president of Calyx Internet Access, received a National Security Letter (NSL) from the FBI. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email