Islamabad [Pakistan], October 10 (ANI): Pakistan's former PM and Pakistan Tehreek-I-Insaaf (PTI) Party founder Imran Khan wrote a letter to the UN against the incumbent government's decision to execute constitutional amendments that aim to threaten judicial independence and human rights in the country, Geo Tv reported. As the ruling coalition government led by Pakistan PM Shehbaz Sharif strives to secure the numbers neede