mr. sedney and mr. denver, what are your approaches to reviewing projects to determine if they are sustainable, all you ensuring that a new commitment of u.s. taxpayer dollars is to make sure that the afghans can carry on after we have gone? how is that process formalized? >> usaid is intensely focused on this question of sustainability. it goes in two different directions. one is are the actual investments we're making sustainable? in other words, will power projects that are being built be maintained? well schools be used? that is one aspect of sustainability. this aspect is the broader question -- the second aspect is the broader question of how this afghanistan itself maintain these investments over the longer term, and in terms of developing economic growth? on the first part, was certified at any program -- we certified that any program we are doing as capital investment must tap the sustainability plan. we have intensified this in the past few months by creating what we call sustainability guidan