Sir: According to reports, two Pakistani men have been arrested before they could go to Syria to join the ranks of Islamic State (IS). The two men belong to Karachi and were apprehended in Iran, near the Turkish border. This is the first time we are hearing of active recruitment from Pakistan with our people actually physically travelling to join the brutal hordes of IS. The government needs to wake up to the very real threat of IS, a threat that will merge into a reality very soon if steps are not taken to beat back the extremist tide. What are we waiting for? The hoisting of the IS flag from our shores? YOUSAF KHAN Islamabad