. >> smith: but frontline's investigation found that taliban leaders still move freely around the country. my colleague, stephen grey, made contact with a taliban commander currently sheltering in pakistan. he arranged to meet him just outside the capital, islamabad, not far from where osama bin laden was killed. the commander told us how dependent the taliban is on sanctuary in pistan to wag war across the border. >> grey: is the border hard to cross? >> frank, we don't know on any given time or day what side the pakistanis are on. there is overwhelming evidence that, you know, even as the pakistani government takes, you know, between $1 billion and $2 billion a year from the united states government in aid, they also maintain links with the taliban and they support the taliban. and they certainly support and maintain very extensive links with the haqqani network, which is one of the most deadly insurgent groups operating in afghanistan. >> smith: the haqqani network is a major branch of the taliban, with close links to al qaeda. pakistan's military intelligence agency, the isi, h a history of suprting them. >