The word "explosive" doesn't do justice to the details of the emails Donald Trump Jr tweeted out on Tuesday morning. Calamitous, perhaps? Seismic? Twitterdämmerung? The president's eldest son probably revealed this correspondence because the New York Times was about to publish it, a fourth devastating journalistic wave that was poised to crash on the White House at any moment. If that's the case Trump Jr's act, while committed in the name of being "totally transparent", was akin to shooting oneself in the head to avoid getting shot. He certainly didn't do it to save his own skin. Here are four of the most remarkable passages of the email chain that will live in infamy - and what it all means. "This is obviously very high level and sensitive information but is part of Russia and its government's support for Mr Trump" Trump Jr originally tweeted out the first three pages, leaving out page four, which has all the juiciest bits. It was like Beethoven's Ninth Symphony without Ode to Joy or