Kathmandu. Speaker Dol Prasad (DP) Aryal has said that the tourism sector is the backbone of the country's economy.Inaugurating the 59th Annual General Meeting of the Nepal Association of Tour and Travel Agents (NATTA) here today, he stressed that all concerned parties must be active for the development of this sector which earns foreign currency.The Speaker said that the government should be serious in solving the policy and structural problems of the tourism sector, and that business organizations like NATTA should contribute as much as possible to the development of the tourism industry.He emphasized that the national flag carrier Nepal...