Demolish all illegal structures

Aminur Rahim, New DOHS, Mohakhali, Dhaka
Why does the government have to wait for a fatal accident to occur before taking any action? Many such catastrophic accidents may occur in future as there are so many buildings which have been built illegally and are an extreme danger to the people who live in or around it. Even the high-rise buildings near the airport are also at risk. I hope the government will take measures to prevent such disasters in future.