52 years old
Mr. Greene was the CEO was Safe Flight Instrument Corp., a White Plains, New York, firm that also sponsored the Corporate Angel Network, a program that flies cancer victims throughout the country for treatment.
Donald's family has wondered why he didn't call from the plane, but they think they know the answer.
"There's no question in our minds he was in control of the plane at the end," said Mr. Greene's sister-in-law, Cecilia Rhoda. "I could hear him saying, 'We're going to die anyway, but let's prevent as much chaos as we can.'"
For the Pittsburgh Post-Gazette's biography of Donald F. Greene, click here.