Do you smell that?

The biggest story today seems to be the strange smell in New York City. The last 15 minutes of CNN on TV has been devoted to the situation:

Authorities were investigating widespread reports today of a strong odor that many described as similar to natural gas, permeating parts of New York City and nearby areas of New Jersey during the morning commute. In some buildings, office workers were evacuated and subway and train lines affected, but the mysterious smell did not appear to be harmful. (NYT)