Jamaat-e-Islami (JI) Ameer Syed Munawar Hasan said that they would stage of a sit-in outside the parliament if the government tried to open Nato supply lines. Addressing a Defence of Pakistan (Difa-e-Pakistan) conference here in Multan on Sunday, Munawar Hassan urged the government to review its relations with the United States and said that US was responsible for instability in Pakistan and the region. Earlier, the rally was also addressed by Sheikh Rashid Ahmad and former ISI Chief Lt General (Retd) Hameed Gul.