The basic textbook employed by the Defense Institute of Security Cooperation Studies (DISCS - formerly DISAM) for instruction of all classes covering the full range of security cooperation activities. The text is revised annually and commonly referred to as the Green Book as it is bound in a green cover.
7938 Passenger Train is a City Trains set released in June 2010. It was sold in the US as a Special Edition set at the LEGO Store and Toys R Us.
That question will be answered in this guide that shows you how and who to unlock to get the full roster of secret Lego Marvel Super Heroes unlockable characters on PS3, Xbox 360, Wii U, PC, PS Vita, 3DS, DS, Xbox One & PS4.