Water flows into New Orleans through a breech of the17th Street canal levee shown in this undated aerial photo provided by the Army Corps of Engineers. A foundation problem _ although not the one targeted by earlier studies _ caused the 450-foot-long break in a floodwall and levee on New Orleans' western edge when Hurricane Katrina hit, the U.S. Army Corps of Engineers said Friday March 10, 2006. (AP Photo/Army Corps of Engineers, HO)
Easy to see it was pushed back in that picture.
Of course, not seen is the construction barge that did the initial damage when is rammed through the levee earlier that day.