My Dad Died on Flight 93. I Miss the Way America Responded.

Mr. Greene is the son of Donald F. Greene, who died on Sept. 11 aboard United Airlines Flight 93.

When I was 10 years old, trauma arrived quietly, through the voice of my pediatrician. I was out of school that morning with a toe infection when the doctor walked into the exam room and told my mother and me that a plane had hit the World Trade Center in New York City.

At 10, you live in a world that is small and immediate. Barely a week earlier, we had........

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