▁of ▁foreign ▁govern ments ▁in ▁Boliv ia ' s ▁affairs ; ▁the ▁accept ance ▁of ▁foreign ▁troops ▁on ▁Boliv ian ▁territory ; ▁cor ruption ▁within ▁the ▁national ▁security ▁ag encies ▁and ▁courts ▁of ▁justice ; ▁the ▁growing ▁control ▁of ▁mass ▁media ▁by ▁n arc ot ics ▁tra ff ick ers ; ▁the ▁spread ▁of ▁drug ▁ab use ▁among ▁Boliv ian ▁youth ; ▁and ▁the ▁increased ▁links ▁between ▁tra ff ick ers ▁and ▁gu err illa ▁groups . ▁ ▁N arc ot error ism ▁An ▁unw anted ▁by - product ▁of ▁Boliv ia ' s ▁c oca ine ▁industry ▁was ▁the ▁import ation ▁of ▁Colomb ian - style ▁drug ▁violence . ▁In ▁the ▁late ▁ 1 9 8 0 s , ▁Colombia ' s ▁Med ell ín ▁Cart el ▁reported ly ▁w ield ed ▁considerable ▁power ▁in ▁Boliv ia , ▁setting ▁prices ▁for ▁c oca ▁paste ▁and ▁c oca ine ▁and ▁terror izing ▁the ▁drug ▁under world ▁with ▁h ired ▁assass ins . ▁Furthermore , ▁drug ▁bar ons , ▁organized ▁into ▁families , ▁had ▁established ▁their ▁own ▁f ief dom s ▁in ▁C och ab amba , ▁Ben i , ▁and ▁Santa ▁Cruz ▁depart ments , ▁using ▁b rib es ▁and ▁assass in ations ▁to ▁destroy ▁local ▁authority . ▁ ▁In ▁September ▁ 1 9 8 6 , ▁three ▁members ▁of ▁a ▁Boliv ian ▁scientific ▁team ▁were ▁s lain ▁in ▁the ▁H uan ch aca ▁National ▁Park ▁in ▁Santa ▁Cruz ▁Department ▁shortly ▁after ▁their ▁aircraft ▁land ed ▁beside ▁a ▁c land est ine ▁c