Chief Pakistan Muslim League (N) Mian Muhammad Nawaz Sharif has urged the political leadership of the country to unite in the face of huge challenges such as rehabilitation of IDPs, drone attacks, and security issue in FATA and Swat. He was addressing the commemoration ceremony pertaining to 11th anniversary of the nuclear tests conducted by Pakistan back in 1998. The programme was organised by Tehreek-e-Karkunan-e-Pakistan under the auspices of Nazria-e-Pakistan Foundation. Chairman Nazria-e-Pakistan Majid Nizami and Justice (Retd) Javed Iqbal were also present on the occasion. Sharif congratulated the nation and the party workers on 'Yaum-e-Takbeer'. He spoke about those trials and tribulations he experienced in terms of pressure from the international community for undertaking the nuclear tests.