A lackadaisical approach to internal security and failure to coordinate a response has been the bane of the problem in India.
Why the US has managed to secure its mainland post 9/11 is not only because of an efficient Homeland Security organisation but because the US Special Forces (USSF) are operating in 200 countries including India. Significantly, USSF have undeclared tasks such as conducting proactive, sustained ‘man-hunts’ and disrupt operations globally; building partner capacity in relevant ground, air and maritime capabilities in scores of countries on a steady – state basis; helping generate persistent ground, air and maritime surveillance and strike coverage over ‘under-governed’ areas and littoral zones and employing unconventional warfare against state-sponsored terrorism and trans-national terrorist groups globally. Before 26/11, Al-Qaeda had planned similar operations against New York but could not because the USSF had infiltrated Al-Qaeda. One cannot guard the house by simply barricading it. You must patrol the streets and the area outside.
Growing inter-dependence and interlinking of terrorist groups regionally and internationally should be a matter of serious concern. It is not the US alone that has deployed its Special Forces abroad. This is the case with most advanced countries including UK, Russia, Israel, China and even Pakistan. Pakistan’s SSG was operating with the Taliban in Afghanistan and has been active in Jammu and Kashmir, Nepal and Bangladesh, primarily training anti-India forces. There is a strong possibility of their presence in the Maldives and Sri Lanka as well, aside from presence within India. The Chinese have been smarter. For all the development projects throughout the globe, including in Myanmar, Nepal, Pakistan-POK, Sri Lanka, Bangladesh and Seychelles, contracts underway by PLA-owned/affiliated companies employ serving and veteran PLA soldiers and disguised Special Forces with assigned tasks, including evacuation of Chinese citizens from that country in case of emergencies.