PESHAWAR: Operation Zarb-e-Azb on Tuesday successfully completed its two years. The Pakistan Army in mid-2014 launched the operation in a bid to wipe out militant bases in North Waziristan and bring an end to a decade-long insurgency that had cost Pakistan thousands of lives. Pakistan Army says it has killed more than 3,500 terrorists while over 400 soldiers embrace martyrdom. The operation was intensified after the Taliban massacred more than 150 people, mostly children, at a school in the northwestern city of Peshawar in December 2014. Since the launch of the operation, security has improved noticeably in Pakistan with militancy-related violence dropping to its lowest level last year. Global leaders have also praised the operation as a success.