Bomb explodes on Lahore's Mall Road near Punjab assembly during protest

Re: Bomb explodes on Lahore’s Mall Road near Punjab assembly during protest

I know how many people stops at cantt checkposts but let see who dont want to see beyond his nose willfully. Do you even know for how long in a day traffic stuck in other parts of the city?
Why do they check and make long queues at thokar niazbaig, shahdara?