Sir — New York, which bore the brunt of 9/11, has witnessed another massacre after 16 years, which claimed the lives of several people. This attack, which is the seventh lethal attack after 9/11 on US soil linked to the Al Qaeda or the Islamic State, is a reminder that the world is now in a more difficult phase of countering terrorism.
Increasingly, terrorism is now associated with lone wolves, radicalised individuals who do not have direct organisational connections to a terrorist group but are blinded by faith, their conscience buried under the depths of indoctrination. Crowded cities are chosen with utmost care to inflict maximum casualties. With increased urbanisation and population influx, cities have become vulnerable. Imagine, if such a pattern is transported to the population-rich Indian cities!