iReporter recalls vivid scenes from `` safe '' side of floodgate . Officials expected to blow relief hole in one levee . By Michael Biesecker, USA TODAY WASHINGTON  `` Katrina took away the shock value , '' says one resident .
iReporter recalls vivid scenes from `` safe '' side of floodgate . Officials expected to blow relief hole in one levee . Some residents rescued from rooftops . `` Katrina took away the shock value , '' says one resident .