Using newlydeclassified documents, this book explores why U. S. military leaders afterWorld War II sought to monitor the far north and understand the physicalenvironment of Greenland, a crucial territory of Denmark. It reveals afascinating yet little-known realm of Cold War intrigue and a delicatediplomatic duet between a smaller state and a superpower amid a time of intenseglobal pressures. Written by scholars in Denmark and the United States, thisbook explores many compelling topics. What led to the creation of the U. S. Thule Air Base in Greenland, one of the world's largest, and why did the U. S. build a nuclear-powered city under Greenland's ice cap? How did Danish concernabout sovereignty shape scientific research programs in Greenland? Alsoexplored here: why did Denmark's most famous scientist, Inge Lehmann, becameinvolved in research in Greenland, and what international reverberationsresulted from the crash of a U. S. B-52 bomber carrying four nuclear weaponsnear Thule in January 1968?