The National Security Agency advised its officials to cite the 9/11 attacks as justification for its mass surveillance activities, according to a master list of NSA talking points.

The document, obtained by Al Jazeera through a Freedom of Information Act request, contains talking points and suggested statements for NSA officials (PDF) responding to the fallout from media revelations that originated with former NSA contractor Edward Snowden.

Invoking the events of 9/11 to justify the controversial NSA programs, which have caused major diplomatic fallout around the world, was the top item on the talking points that agency officials were encouraged to use.

Under the subheading “Sound Bites That Resonate,” the document suggests the statement “I much prefer to be here today explaining these programs, than explaining another 9/11 event that we were not able to prevent.”

NSA head Gen. Keith Alexander used a slightly different version of that statement when he testified before Congress on June 18 in defense of the agency’s surveillance programs.

Asked to comment on the document, NSA media representative Vanee M. Vines pointed Al Jazeera to Alexander’s congressional testimony on Tuesday, and said the agency had no further comment. In keeping with the themes listed in the talking points, the NSA head told legislators that “it is much more important for this country that we defend this nation and take the beatings than it is to give up a program that would result in this nation being attacked.”

Critics have long noted the tendency of senior U.S. politicians and security officials to use the fear of attacks like the one that killed almost 3,000 Americans to justify policies ranging from increased defense spending to the invasion of Iraq.