U.S. Secretary of State Hillary Clinton has asked Pakistan to take decisive steps against the terrorists operating from its soil. Mrs. Clinton, the most senior U.S. official to visit Pakistan since U.S. Navy SEALS killed the al Qaeda leader this month, said she had asked Pakistani President Asif Ali Zardari, Prime Minister Yusuf Raza Gilani as well as army chief General Ashfaq Kayani to do more to fight militants.She said, Washington is looking to the government of Pakistan to take decisive steps in the days ahead. The discovery of the al Qaeda leader in a garrison town just 50 kilometers away from the capital, Islamabad, on May 2 raised fresh doubts about Pakistan's reliability as a partner in the U.S.-led war on militancy.Mrs. Clinton said, Pakistani officials had told her what they called someone, somewhere had been providing support for bin Laden in Pakistan. Mrs. Clinton's visit comes at a time when U.S. lawmakers questioned whether Pakistan should be receiving billions of dollars in aid. Mrs. Clinton said, for the past decade, many of the world's most vicious terrorists, including al Qaeda's most important leaders, have been living in Pakistan. Mrs. Clinton said, Islamabad has the responsibility of preventing insurgents from waging war from Pakistani territory.