If author John M. Newman is right that a KGB "mole" by the name of Bruce Leonard Solie (look him up) in the CIA's mole-hunting Office of Security sent (or duped his confidant, mentor, and mole-hunting subordinate, James Angleton, into sending) Oswald to Moscow in 1959 as an ostensible "dangle' in a (unbeknownst to Oswald and Angleton) planned-to-fail hunt for "Popov's U-2 Mole" (Solie) in the wrong part of the CIA, the Soviets *and* the duped-by-KGB Americans would have known Oswald was coming.
Ergo, LHO's facilitated-by-CIA flight from England to Helsinki, his expedited-by-KGB USSR tourist visa, Snyder's not having the Marine guards at the American Embassy arrest him when he told Snyder (and the hidden KGB microphones) he was going to tell the Ruskies everything he'd learned as a Marine radar operator (including "something of special interest") etc., etc., etc.
