 The Obama administration offered its first extensive explanation on drone-strike policy in April 2012, concluding that it was "legal, ethical and wise".The CIA's general counsel, Stephen Preston, in a speech entitled "CIA and the Rule of Law" at Harvard Law School on 10 April 2012, claimed the agency was not bound by the laws of war; in response, Human Rights Watch called for the strike program to be brought under the control of the US military.In May, the US began stepping up drone attacks after talks at the NATO summit in Chicago did not lead to the progress it desired regarding Pakistan's continued closure of its Afghan borders to the alliance's supply convoys.