Travelers on Delta Airlines look at a departure screen Monday, Oct. 29, 2012, in Detroit. Dozens of departing flights have been canceled at Detroit Metropolitan Wayne County Airport as a looming superstorm locks down flights to the East Coast. Hurricane Sandy continued on its path Monday, as the storm forced the shutdown of mass transit, schools and financial markets, sending coastal residents fleeing, and threatening a dangerous mix of high winds and soaking rain. (AP Photo/Charlie Riedel)

Travelers on Delta Airlines look at a departure screen Monday, Oct. 29, 2012, in Detroit. Dozens of departing flights have been canceled at Detroit Metropolitan Wayne County Airport as a looming superstorm locks down flights to the East Coast. Hurricane Sandy continued on its path Monday, as the storm forced the shutdown of mass transit, schools and financial markets, sending coastal residents fleeing, and threatening a dangerous mix of high winds and soaking rain.  (AP Photo/Charlie Riedel)

Travelers on Delta Airlines look at a departure screen Monday, Oct. 29, 2012, in Detroit. Dozens of departing flights have been canceled at Detroit Metropolitan Wayne County Airport as a looming superstorm locks down flights to the East Coast. Hurricane Sandy continued on its path Monday, as the storm forced the shutdown of mass transit, schools and financial markets, sending coastal residents fleeing, and threatening a dangerous mix of high winds and soaking rain. (AP Photo/Charlie Riedel)

A traveler on Delta Airlines waits for her flight Monday, Oct. 29, 2012, in Detroit. Dozens of departing flights have been canceled at Detroit Metropolitan Wayne County Airport as a looming superstorm locks down flights to the East Coast. Hurricane Sandy continued on its path Monday, as the storm forced the shutdown of mass transit, schools and financial markets, sending coastal residents fleeing, and threatening a dangerous mix of high winds and soaking rain. (AP Photo/Charlie Riedel)