estimated $2.1 billion to fly supplies needed by u.s. and nato troops through the northern central asian corridor. truck convoy backed up at the border were attacked. pakistanis close the c.i.a. air base used for drone strikes and demanded $5,000 per vehicle that passed through the border. so what changed? pakistani dropped fees for each truck passing through the border and the u.s. apologize u.s. apologized. some say pakistan gained more from the break through. >> it has been able to obtain the u.s. apology, obtain that relations have improved between the two countries without takes those difficult steps of going after the sanctuary, getting the taliban to play a positive role of reconciliation talks. >> pakistan new prime minister indicated another motivation for opening the supply line.