[Fog engulfed much of New York City this morning. What did it look like out your window? Photo via @nymetwowx/Twitter.]

Every single subway line in New York City was delayed this morning, as many of us learned much too late. The reason? "Inclement weather." Which in this case was fog. Fog broke the entire subway system.

[While the U.S. Northeast handles "Snowpocalypse," North India is dealing with "A-fog-alypse"—thick fog disrupting flight and train schedules and leaving thousands of passengers stranded. Image via AP]

Goldman Sachs chief Lloyd Blankfein, Morgan Stanley CEO John Mack, and Citigroup chairman Dick Parsons were all supposed to be in Washington yesterday to meet with President Obama at the White House. But then a tiny patch of fog materialized in the skies overhead and they had to retreat to their offices, victims of a force even more powerful than Wall Street's mightiest: Mother Nature. So how did that go down in Washington?