A Russian internet comedy duo tricked three of OpenAI’s highest ranking military and national security staff into a candid conversation about arming Ukraine. The online pranksters posed as officials from Ukraine’s government, according to a recording of the meeting posted online. The Russian comedy duo known as Vovan and Lexus have pulled off a long string of prank telephone calls to famous figures since 2011, with victims ranging from Elton John to John McCain. The group, whose pranks have ofte...