WASHINGTON - Even though Foreign Minister Shah Mahmood Qureshi spoke of differences between the positions of Pakistan and the United States, especially over the drone attacks, after his meeting with two visiting senior U.S. officials in Islamabad, the State department here Wednesday called the discussions between them "constructive." With the chairman of the Joint Chiefs of Staff, Admiral Mike Mullen, and the special envoy to the region, Richard Holbrooke, at his side on Tuesday, Qureshi, said: We did talk about drones, and let me be very frank: there is a gap between us. He added, The bottom line is the question of trust. Asked about the Pakistani foreign minister's comments, Spokesman Robert Wood said in Washington, This (fighting terrorists on the Afghan border) is a very complex issue. We want to work with Pakistan. We have been working with Pakistan as best we can support them in their efforts to fight extremists. And we are going to continue to do so. Will there be differences of opinion from time to time on how we go forward? Yes. We do agree on a lot of ways forward. But, this is normal in this type of relationship, particularly when you are dealing with very difficult and thorny issues, he added in response to a question at the negular briefing. Ambassador Holbrooke, Admiral Mullen both had very very good meetings in Pakistan with a number of officials, despite what you read in the media about there not having been a meeting between Ambassador Holbrooke, Admiral Mullen and Director (General ISI Lt Gen Ahmed Shuja) Pasha and (Army Chief) Gen (Ashfaq Parvez) Kayani, that was not true, they did meet. So, they were good very constructive meetings, he remarked. Are these difficult issues? Yes. Are we trying to do what we can to work them out? Absolutely. He said terrorism is a critical issue facing not just Pakistan and Afghanistan but worries the international community how the anti-terrorism partners fight these extremists.