on rupert thornhill and i knew charlie. he was a company commander in iraq so was happenstance that this all came together. i got out there in august of 2009 and i was there in the last month or so with the new commanding officer in place. i was able to travel -- the battle creek area. i traveled to all 12 bases and outposts and was out on the ground with the troops. the book isn't my description what would happen to me. there are few things in there that didn't involve me but really that was an opportunity to start the interview process and you know yourself when you are embedded with troops you have conversations that you just don't have anywhere else. they open up and they talk about their fears and you might be the last person ever to speak to them. you are also someone coming from the outside and i was very clear to them this was not a newspaper article. this was the book and a history so i thought the opened up little bit more when they knew this wasn't going to be published in a year or so so that was the start of it