New Orleans after Hurricane Katrina:

A Texas Army National Guard Blackhawk black deposits a 6,000 pound-plus bag of sand and gravel on-target, Sunday, September 4, 2005as work progresses to close the breach in the 17th Street Canal, New Orleans. (U.S. Army Corp of Engineers photo by Alan Dooley)

Note the patches of raised earth still covered with green grass; these were portions of the levee in back of the floodwall which were pushed up and back during the breach.

Source: http://www.usace.army.mil/katrina-images/NO-A-09-04-05_0072.jpg

• 
  Image of area at approximate time of Blackhawk picture.

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