A high-intensity blast in a car near the Red Fort Metro Station in Delhi on November 10 killed 13 people and injured more than 20 others. Delhi has witnessed such terror incidents in the past: In the year 2000, a unit of the Rajputana Rifles in the Red Fort was attacked; in 2001, terrorists stormed the Parliament complex; in 2005, there were blasts in Sarojini Nagar and Paharganj; in 2008, there were blasts in Connaught Place, Greater Kailash and Karol Bagh, and finally, in 2011, there was an explosion outside the Delhi High Court.

For the last 14 years, however, the national capital had respite from terror incidents. A sense of complacency was also perhaps creeping in. That has now been shaken. Eternal vigilance, as they say, is the price of liberty, and one can now see the security personnel in a state of........

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