We know that your orders are repeatedly ignored and set aside by Zardari's government making mockery of the justice system. The question is, how long you are going to stay indifferent while every day innocent people are gunned down in Karachi. Sir, wouldn't it be appropriate to try army this time by invoking Article 190 of the Constitution to stop this senseless carnage? The inept federal and provincial governments have failed to bring peace in this pitiful war-torn city which at some stage was known as the city of lights. Why the fire lit by the political hate be extinguished with the blood of the innocents? Sir, do something before chaos turns into civil war or revolution. DR. GHAYUR AYUB, London, August 20.