So why in the past is a small probability, or low frequency of occurrence of terrorist attacks in India are becoming more and more high-density place, India how to do?

• 中英文对照:那么为什么过去是一个小概率，或者是低频率发生的恐怖袭击，现在在印度变得越来越高密度地发生，印度怎么办？