No doubt Mumbai is a soft target. At the same time, it is a mega city and there are several kinds of professions that carry loads on them. That being the case, it is rather difficult each person's entry and exit to monitor or check what they carry.
Two wheelers are parked anywhere and every where, people carrying bundles, sack full of stuff move in and out of buildings, and residents carry grocery bags. How to monitor all these activities? Secondly, even emails, texting can be in codewords & I do not think our security forces have the means to monitor millions of emails and texting that travels through the cyberspace.and what if most of the planning is done with person to person meeting? Hard evidence can only be obtained by forensic testing and analysis. It is also likely the two wheeler may have been randomly selected. These people have to realize by planting explosives, little material damage is caused, but they have to consider the families they ruin, as many lone breadwinners succumb to these explosions, no life can be brought back. These cowards are hurting only the common man, normal families and not the Nation of India. MD