How Sept. 11 changed charity in America

The terrorist attacks of September 11, 2001, inspired Americans to step up and help their neighbors like never before, donating billions of dollars to families who lost loved ones.

Four years later, after Hurricane Katrina ravaged New Orleans and the Deep South, Americans pulled out their checkbooks once again.

Americans also donated nearly $2 billion to victims of the tsunami that slammed the South Pacific in 2004 and nearly $1.5 billion to victims of the earthquake that devastated Haiti last year.