Highly recommend his biography, "No Better Time: The Brief, Remarkable Life of Danny Lewin."
He was a commando turned computer scientist turned billionaire who died fighting terrorists at the age of 31. And, remarkably - 9/11 was a big turning point for Akamai because it was a first news event that people monitored using the internet, so many news websites had to turn on Akamai to handle the traffic surge.
The Danny Lewin Park in Cambridge, MA was just redone: www.cambridgeredevelopment.org/danny-lewin-park-enhancement.