The Man Called X - Red Messenger

Ken Thurston is called to a meeting in New York with his supervisor, Chief of the U.S. Intelligence Agency. Also present in this meeting is Dr. Markov, eminent nuclear scientist. As Ken enters the office, he says "Dr. Markov, good to see you again". Markov says "Mr. Thurston, I cannot tell you how grateful I am to you and the chief". Ken says "You make it sound pretty serious". Markov says "No, it is worse than that. Worse than anything that I could ever have imagined". The chief says "A security leak?" Ken asks "Anything to do with the doctor's experiments on a new type of atomic reactor?" Markov says "Oh, you know about that?" Ken says "Guess I'm not the only one". The chief says "Yesterday in Strasburg, a man was shot down while resisting arrest. He turned out to be a Red Messenger, a courier". Markov says "Yes, and I still cannot believe, on him, he should have had information about my experiments. It is impossible". Ken says "Doctor, it's about time we in the West learned that the Red Espionage system specializes in the impossible". Markov says "But, every precaution was taken. Now, what can they do but suspect me? Especially with my old world birth and background". Ken says "This is a lot more important than just you, Dr. Markov". He says "Oh, believe me, Mr. Thurston, I did not come here seeking your help because I....well". Ken says "I know, doctor. I know".  Once Ken arrives in Strasburg, he sees Pagon selling souvenirs. Pagon says "Mr X, what have you got to say for yourself?" Ken says "Pagon, the world isn't that small. Why are you here in Strasburg?" So, we can go to Switzerland. See, I already got two plane tickets for Lucerne. The plane leaves in an hour". Ken asks "What about Lucerne?" Pagon says "Well, I was in Paris, working on a big deal, when I heard about this red courier business, and him being from Lucerne".