Defence of the Realm 
Buy this movie now
Vernon Bayliss: Vodka and Coca-Cola. Detente in a glass!
Ministry Man: You would agree, would you not, that certain things bearing on the defence of the realm are best left unsaid.
Nicholas 'Nick' Mullen: If you mean cover-up, no, I wouldn't.
"Defence of the Realm Quotes." Quotes.net. STANDS4 LLC, 2014. Web. 23 Apr. 2014. <http://www.quotes.net/movies/Defence of the Realm>.