Something that struck me as a weak plot point was the ending even though I liked it better that the alien squid. If you nuked NY and the other major cities there wouldn't be world peace and certainly not a newspaper pining for something to write about. Most likely there would be utter chaos. Possibly the biggest port in the nation and center of the financial world. Most likely the country would be in a socio-economic meltdown that would be difficult to recover from.
I'm not sure about the movie, but in the comic only part of the city gets destroyed by the squid.
in the movie it appeared the whole city was flattened.