 By the time it was finished the cost had ballooned to $10 million.The plot has parallels to events from April 1959 concerning a missing experimental Corona satellite capsule (Discoverer II) that inadvertently landed near Spitsbergen, Norway, in the Arctic Ocean on April 13, which was believed to have been recovered by Soviet agents.In 2006, the United States National Reconnaissance Office declassified information stating that "an individual formerly possessing Corona access was the technical adviser to the movie" and admitted "the resemblance of the loss of the Discoverer II capsule, and its probable recovery by the Soviets" on Spitsbergen Island.