Chief of Army Staff Gen. Qamar Javed Bajwa inaugurated the tunnel September 27.
Terrorism cost Pakistan Rs. 12.6 trillion ($120 billion) in the past 16 years, Foreign Minister Khawaja Asif told the Senate recently.
Improved security will rejuvenate the economy, business leaders predict.
The centuries-old irrigation system is still in use in Mohmand Agency and other areas of northern Pakistan.
The Punjab government aims to train 10,000 youth in information technology and entrepreneurial skills.
Tribe members are enjoying the benefits of peace in the region, which include the return of economic activity and jobs.
For many years the train was either completely unavailable or very limited due to the shadow of terrorism along the route. Now things are different.
Operation Zarb-e-Azb has established durable peace in the area and now the government is focusing on improving education and the economy, observers say.
The main challenges the ten Economic Co-operation Organisation (ECO) countries face are extremism, terrorism and drug trafficking, officials say.
The two countries agreed to work together to fight extremism and enhance economic relations.