A line of traffic extends down Interstate 10 heading towards Baton Rouge, 

A line of traffic extends down Interstate 10 heading towards Baton Rouge, as many residents leave the New Orleans area in anticipation of tropical storm Isaac, which is expected to make landfall on the Louisiana coast as a hurricane, in Kenner, La., Monday, Aug. 27, 2012. (AP Photo/Gerald Herbert)
Associated Press
A line of traffic extends down Interstate 10 heading towards Baton Rouge, as many residents leave the New Orleans area in anticipation of tropical storm Isaac, which is expected to make landfall on the Louisiana coast as a hurricane, in Kenner, La., Monday, Aug. 27, 2012. (AP Photo/Gerald Herbert)
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