In late March 2012 , a US military official stated that the United States would have to use routes through the Northern Distribution Network ( NDN ) for supplies to Afghanistan if Pakistan refused to reopen its supply lines . However , he conceded the expensiveness of these routes and noted that negotiations with Pakistan regarding the possibility of opening of the supply routes were ongoing . After reviewing United States-Pakistan relations and outlining what was needed to repair bilateral relations , the Pakistani parliament turned the decision of reopening the NATO supply lines over to the government in April 2012 . Due to an upcoming general election in Pakistan , with widespread anti-American sentiments in the country , the Pakistani government was reluctant to reopen the lines , and postponed its decision until the United States responded positively to Pakistani demands outlined in the parliamentary recommendations , such as a US apology for the November 2011 incident , the bringing of those involved in the strike to justice , and a stop to US drone airstrikes . Talks between Pakistan and the United States failed in April 2012 after Pakistan could not get an unconditional apology from the United States for the November 2011 incident . The White House refused to apologise after Taliban attacks in Kabul and other cities in Afghanistan on 15 April 2012 , which according to US military and intelligence officials came from the Haqqani network , an Afghan group working from a base in North Waziristan along the Afghanistan border in Pakistan 's tribal belt . Pakistani officials said they can not open the NATO supply routes in Afghanistan without a US apology
Taliban attacks in Kabul and other cities
April 2012 Afghanistan attacks
2011 NATO attack in Pakistan