Why has nobody been fired for bad reporting on Katrina?

On CNN five years ago today, Paula Zahn spoke about “very discouraging reports out of New Orleans” about “bands of rapists going from block to block, people walking around in feces, dead bodies floating everywhere. And we know that sniper fire continues.”

In her column published September 3, 2005, in the New York Times, Maureen Dowd referred to New Orleans as “a snake pit of anarchy, death, looting, raping, marauding thugs, suffering innocents, a shattered infrastructure, a gutted police force, insufficient troop levels and criminally negligent government planning.”
http://mediamythalert.wordpress.com/2010/09/01/katrina-and-the-myth-of-superlative-reporting/