Some report the ISI and CIA stepped up cooperation in the aftermath of the 9/11 attacks to kill and capture senior Al Qaeda leaders such as Sheikh Younis Al Mauritan and Khalid Shaikh Mohammed, the planner of the 9/11 attacks who was residing in Pakistan. Pakistan claims that in total around 100 top level al-Qaeda leaders/operators were killed/arrested by ISI. Secretary of State Hillary Clinton said Pakistan is paying a "big price for supporting the U.S. war against terror groups. ... I think it is important to note that as they have made these adjustments in their own assessment of their national interests, they're paying a big price for it".