The folks at The National Security Archive are always up to something interesting, like this recently released electronic briefing book. The site provides users with access to numerous documents related to the activities of Soviet submarines during the Cuban Missile Crisis. Visitors can look over the original Soviet Navy map of the Caribbean, which shows the locations of the four Foxtrot diesel submarines that had deployed from the Kola peninsula northwest of Murmansk on October 1962, bound for Mariel port in Cuba. That's just the tip of the proverbial iceberg: the book also contains images of the diary of submariner Anatoly Petrovich Andreyev and video of Captain John Peterson (United States Navy, retired) talking at a conference in 2002 about the hunt for the submarines. It's an absolutely engrossing collection and one that will merit several return visits.