Sense of purpose.

They popped up through the side entrance just to my left as I was on my way out of Liverpool Street station, this lot, marched across the courtyard, over Bishopsgate, and straight into KFC on the other side. You don't get that kind of organisation without years of rigorous and careful training. A well-oiled machine.

Liverpool Street Station, Bishopsgate, London...
Original article from http://www.igorclark.net/2009/06/29/sense-of-purpose-.html