sixth anniversary of 9/11 being marked in Washington , Pennsylvania , Washington . CNN.com readers share thoughts and memories of 9/11 heroes . I-Report : Share your photos , memories of One heroes .
Sixth anniversary of 9/11 being marked in New York , Washington , Pennsylvania . CNN.com readers share thoughts and memories of 9/11 heroes . I-Report : Share your photos , memories of 9/11 heroes .