AdvertisementSKIP ADVERTISEMENTYou have a preview view of this article while we are checking your access. When we have confirmed access, the full article content will load.F.B.I. investigators worked with the cybersecurity firm CrowdStrike to dismantle so-called laptop farms that steal American identities to earn cash for Pyongyang.North Korea has generated billions in cash in recent years, evading international sanctions, through remote I.T. worker schemes, U.S. officials say. Credit...Anthony ...