sentences:  The report also confirmed that the United States stockpiled nuclear weapons in Greenland until 1965, contradicting assurances by Danish foreign minister Niels Helveg Petersen that the weapons were in Greenland's airspace, but never on the ground.The DUPI report also revealed details of Project Iceworm, a hitherto secret United States Army plan to store up to 600 nuclear missiles under the Greenland ice cap.Danish workers involved in the clean-up operation claimed long-term health problems resulted from their exposure to the radiation.