1. Superstorm Sandy
Sandy brought much of the Eastern Seaboard to a standstill when it made landfall the evening of October 29. Just the next day, 12,000 flights were canceled, according to The Wall Street Journal. The impact extended to meetings canceled from Boston to Washington, D.C./Virginia and points south. The Global Business Travel Association predicted that about 514,000 trips would be canceled and $606 million in travel spending lost as a result of storm-related cancellations, causing the 11 states in the path of the storm to suffer an average business travel spending loss as high as $58 million per day. Some analysts project that the revenue impact will be as damaging for New York City hotels as the drop right after the 9/11 terrorist attacks.

Darkened city streets below the Chrysler Building