▁North ▁Korean ▁Cy ber war fare " ▁and ▁claimed ▁that ▁reve aling ▁the ▁facts ▁would ▁affect ▁Donald ▁Trump ▁ 2 0 2 0 ▁president ial ▁campaign ▁in ▁the ▁ 2 0 2 0 ▁United ▁States ▁president ial ▁election . ▁In ▁fact , ▁Mr . ▁Lee ▁worked ▁part - time ▁at ▁the ▁Korean ▁Broadcast ing ▁System ▁( K BS ) ▁( K ore an : ▁ 한 국 방 송 공 사 ; ▁Han ja : ▁ <0xE9> <0x9F> <0x93> 國 放 送 公 社 ; ▁R R : ▁Han - gu k ▁Bang song ▁G ong sa ; ▁MR : ▁Han ' gu k ▁P ang song ▁Kong sa ) ▁before ▁the ▁ 2 0 1 3 ▁South ▁Korea ▁cy ber att ack ▁on ▁ 2 0 ▁March , ▁ 2 0 1 3 ; ▁moreover ,. ▁▁ 2 0 1 8 ▁ ▁Mail ▁bomb ing ▁attempt ▁In ▁late ▁October ▁ 2 0 1 8 , ▁officials ▁intercept ed ▁a ▁series ▁of ▁pipe ▁bomb s ▁that ▁had ▁been ▁ma iled ▁to ▁multiple ▁Democratic ▁Party ▁leaders , ▁including ▁Ob ama ▁and ▁Hill ary ▁Cl inton , ▁and ▁several ▁other ▁high - profile ▁individuals , ▁such ▁as ▁Robert ▁De ▁N iro . ▁No ▁one ▁was ▁injured , ▁and ▁the ▁F BI ▁launched ▁an ▁investigation . ▁A ▁single ▁individual , ▁Ces ar ▁Say oc , ▁was ▁subsequently ▁charged ▁with ▁several ▁fel ony ▁charges ▁related ▁to ▁the ▁incident . ▁▁ 2 0 1 9 ▁On ▁April ▁ 2 0 , ▁ 2 0 1 9 , ▁the