I would put the blame on the Port Authority.

I've seen interview after interview with their spokesperson and his story changes by the hour.

Have also heard the Port Authority has been harassing media, i.e. not allowing them inside JFK to take pictures or talk to pax, and keeping most media outside in the snow.

On a personal note, I've had problems with the Port Authority and taking photography at JFK as a tourist. The Port Authority can be difficult to deal with and is full of bureaucratic fiefdoms.