Pop superstar Madonna was left stunned by the aftermath of Hurricane Katrina, which she describes as worse than the September 11th terrorist attacks. The singer was quizzed on the devastating floods that left much of America's deep south under water, killing thousands and robbing millions of their homes, on the fourth anniversary of the terrorist attacks on New York City and Washington DC. She said: "We have had another natural disaster that's kind of making that (September 11, 2001) look like nothing in comparison. Well not nothing, but it's worse in a lot of ways."