article_snippet: ‘whistleblower’ former US spy 
article_snippet: Edward Snowden and former US spy Edward Snowden supporters in UK.
article_snippet: Edward Snowden’s cheerleaders claim Snowden’s exposed mass unauthorised surveillance by the security services.
article_snippet: Spy chiefs say the leaks revealed by Snowden – who stole 1.7million classified documents – had revealed sensitive intelligence gathering techniques.
article_snippet: Sources have also warned the former US spy Edward Snowden files may have put individual agents in danger by revealing the Snowden files identities or location.
article_snippet: Edward Snowden – who stole 1.7million classified documents – revealed sensitive intelligence gathering techniques .
article_snippet: The spy chief did not mention Snowden by name.
article_snippet: Snowden threw a massive rock in the pool.
article_snippet: Earlier this month, Home Secretary Theresa May added that the leaks by Snowden had ‘damaged’ intelligence agencies across the world and drained Britain’s spies of vital resources.
highlights_snippet: Comes after former US spy Edward Snowden stole 1.7m documents .
  
highlights_snippet: The massive leak revealed sensitive intelligence gathering techniques .