'outsiders' come to mumbai and don't go to US because mumbai is in india & the US is not. cities that are commercial hubs attract 'outsiders' all over the world, be it new york or london. such cities, by virtue of their importance to their respective countries, unfortunately become automatic targets for terrorists. this has nothing to do with 'outsiders' coming in. also, perhaps less than 2% of of these 'outsiders' come to mumbai to try their luck in the media world; most come here to merely earn 2 square meals a day. you are right about the strain being put on the city's infrastructure, but that is a problem that our bureaucrats needs to address with honesty & a will to implement change - not with their usual inefficiency & corruption. i am sure that with a few people with integrity at the helm, it can be taken care of as well.