“These individuals are known for pranking high-level officials and celebrities, particularly those who are supportive of an agenda that is not in line with their governments. In this case, the energy security of Ukraine,” Hynes said.

During the 22-minute call on July 19, Perry, whose department oversees the U.S. nuclear weapons program, discussed a range of topics in a business-like tone, including sanctions against Russia and helping Ukraine develop oil and gas.