NSA hacking Snowden’s biographer’s computer?

Democracy Now! in the USA says about this video:

«The Paragraph Began to Self-Delete»: Did NSA Hack Computer of Snowden Biographer & Edit Book Draft?
Monday, February 24, 2014
Is the National Security Agency breaking into computers and tampering with unpublished manuscripts? Award-winning Guardian journalist Luke Harding says paragraphs of his writing mysteriously disappeared when he was working on his latest book, «The Snowden Files: The Inside Story of the World’s Most Wanted Man.» «I wrote that Snowden’s revelations had damaged U.S. tech companies and their bottom line. Something odd happened,» wrote Harding in The Guardian. «The paragraph I had just written began to self-delete. The cursor moved rapidly from the left, gobbling text. I watched my words vanish.» Harding joins us to talk about the computer monitoring and other times he believes he was being tracked.
Transcript
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