"There was a time when serial blasts had become a common occurrence. It was in this very month of September, specifically on September 13, 2008, that many innocent lives were lost in serial blasts in Delhi. Just a few weeks later, the massive 26/11 attack took place in Mumbai... In the past too, there used to be demands for action against Pakistan following every terror attack, but such calls were often not given due attention; time to pass by was simply awaited," Modi said.