I can't be sure - someone in banking will have to confirm this - but Atta's Visa started with the 4011 series - it could be a German card, which is not really a credit card per se, as they are bank-account linked in Germany, with the bill automatically being paid from your bank account each month. Therefore, no need to worry about trying to get a good credit rating and higher spending level in the U.S. - just fund up a German account and spend it down.

As for money - Afganistan is the major source for hashish, as is Pakistan, but most of the cells are financed by "over organizations", much like state political funds versus federal ones.