Not really much of a caper, all the thieves in this story seemed like bumblers. The inside part of the job was done by two plant employees smuggling refined ingots out a couple at a time (at least initially) in lunch coolers.
According to the story when they were apprehended they actually fell for the "if you just pay us X percentage of the value of what you stole we'll keep this quiet and won't report you to Homeland" routine on the part of the corporate security team