There was not only one terrorist living in the Afghan-Pak bordering areas.
The Western parts of Pakistan, mainly Khyber Pakhtunkhawa and Waziristan were hotbed of terrorists, mainly Tehreek e Taliban and Afghan Taliban. These terrorist groups were using the Western areas of Pakistan as their base camps and conducted terrorist attacks all over Pakistan and Afghanistan.
The Western areas of Pakistan were dangerous areas to go to some 12 to 15 years ago.
The Pakistan government and its citizen should thank USA and Britain for conducting drone attacks against terrorists in Pakistan.