Early in his administration, President Trump signed a directive outlining a strategy of pressure against North Korea that involved actions across a broad spectrum of government agencies and led to the use of military cyber-capabilities, according to U.S. officials.
As part of the campaign, U.S. Cyber Command targeted hackers in North Korea’s military spy agency, the Reconnaissance General Bureau, by barraging their computer servers with traffic that choked off Internet access.
Trump’s directive, a senior administration official said, also included instructions to diplomats and officials to bring up North Korea in virtually every conversation with foreign interlocutors and urge them to sever all ties with Pyongyang. Those conversations have had significant success, particularly in recent weeks as North Korea has tested another nuclear weapon and ballistic missiles, officials said.
Rauhala reported from Beijing.