Your post is misleading. Money flowed through Dubai and Citibank. Who is the culprit here?
Who is a culprit? Lets start with the two UAE hijackers.
"Dubai is also one of the region's most open banking centers and is the commercial capital of the United Arab Emirates, one of three countries that maintained diplomatic relations with the Taliban until shortly after Sept. 11. Sitting at a strategic crossroad of the Gulf, South Asia and Africa, Dubai has long been a financial hub for Islamic militant groups. Much of the $500,000 used to fund the Sept. 11 attacks came through Dubai, investigators believe."