What is the chronological order of these event 1. The US helps form a new government in Afghanistan, 2. Taliban rises in power in Afghanistan, 3. Terrorist attack on September 11, 2001, 4. U. S ground forces land in Afghanistan,5.Osa Bin Laden is shot

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.