In the last five months, the NSA’s surveillance practices have been revealed to be a massive international operation, staggering in scope. But how do all of the NSA’s programmes fit together -€“ and what does it mean for you?

When Edward Snowden met journalists in his cramped room in Hong Kong’s Mira hotel in June, his mission was ambitious. Amid the clutter of laundry, meal trays and his four laptops, he wanted to start a debate about mass surveillance. He succeeded beyond anything the journalists or Snowden himself ever imagined. His disclosures about the NSA resonated with Americans from day one. But they also exploded round the world.