▁safe ▁conduct . ▁Since ▁this ▁has ▁long ▁been ▁their ▁main ▁source ▁of ▁income , ▁resistance ▁to ▁challeng es ▁to ▁the ▁Shin war is ' ▁authority ▁has ▁often ▁been ▁fier ce . ▁ ▁For ▁strateg ic ▁reasons , ▁after ▁the ▁First ▁World ▁War ▁the ▁British ▁built ▁a ▁heavily ▁engine ered ▁railway ▁through ▁the ▁Pass . ▁The ▁K hy ber ▁Pass ▁Railway ▁from ▁Jam r ud , ▁near ▁P esh aw ar , ▁to ▁the ▁Afghan ▁border ▁near ▁Land i ▁K otal ▁was ▁opened ▁in ▁ 1 9 2 5 . ▁ ▁During ▁World ▁War ▁II ▁concrete ▁" drag on ' s ▁teeth " ▁( t ank ▁obst acles ) ▁were ▁ere cted ▁on ▁the ▁valley ▁floor ▁due ▁to ▁British ▁fear s ▁of ▁a ▁German ▁tank ▁invasion ▁of ▁British ▁India . ▁ ▁The ▁Pass ▁became ▁widely ▁known ▁to ▁thousands ▁of ▁Western ers ▁and ▁Japanese ▁who ▁tra ve led ▁it ▁in ▁the ▁days ▁of ▁the ▁hi pp ie ▁trail , ▁taking ▁a ▁bus ▁or ▁car ▁from ▁Kab ul ▁to ▁the ▁Afghan ▁border . ▁ ▁At ▁the ▁Pak ist ani ▁front ier ▁post , ▁travel ers ▁were ▁ad vised ▁not ▁to ▁w ander ▁away ▁from ▁the ▁road , ▁as ▁the ▁location ▁was ▁a ▁bare ly ▁controlled ▁Feder ally ▁Admin ister ed ▁Trib al ▁Area . ▁ ▁Then , ▁after ▁custom s ▁formal ities , ▁a ▁quick ▁day light ▁drive ▁through ▁the ▁Pass ▁was ▁made . ▁ ▁Mon uments ▁left ▁by ▁British ▁Army ▁units , ▁as ▁well ▁as ▁hill side ▁for ts , ▁could ▁be ▁viewed ▁from ▁the