It was nearly midnight.The plane prepared to descend.The mega cityKarachisprawled below.I braced myself.Even by Karachi standardsthis had been a particularly violent year in the city39s turbulent history.I had one night to spend in Karachi before catching another flight.It was a longtaxing drive.There was a whiff of danger in the air.I looked out the window.The sheer scale of this place was