Torino rec'ed this to me the other day, and I realized it's been on my to-read list for over a year now.
I opened up a new tab planning to read this over a week, but I had to put aside plans and stay up late to finish it in two days. (I work long hours otherwise it wouldn't have taken that long)
From the beginning this fic made me tense. I had vivid dreams last night, I think, because of it. When I got to the slash part half way through the story, I was surprised for a moment. I forgot I was reading a Snarry and not a political thriller. That's exactly what this reads like. Your writing is superb and the plot was amazing.
These stories are always a little terrifying to me. It's just so possible that it could happen. Putting it in the HP world was a stroke of genius.