In this encore edition of Fresh Air, host Terry Gross speaks with engineer Abolhassan Astaneh-Asl. Astaneh is a member of a team assembled by the American Society of Civil Engineers to investigate the World Trade Center site. His findings will be used in engineering studies to help improve the structural integrity of buildings. Astanneh also has done research on bomb-resistant designs, following the bombing of the Oklahoma Federal Building. (Originally aired 10/16/01). Also, musician Al Kooper. He seems to have had a hand in every classic rock song ever made. He helped popularize the Hammond B3 organ as part of rock music, performing on recordings of Bob Dylan, Lynyrd Skynyrd, Jimi Hendrix, The Rolling Stones, and The Who. There´s a new 2-CD retrospective of his work called Rare and Well-done: The Greatest and Most Obscure Recordings 1964-2001. His autobiography is Backstage Passes & Backstabbing Bastards: Memoirs of a Rock ´n Roll Survivor.(Originally aired 12/8/98). 1. Language: English. Narrator: Terry Gross. Audio sample: http://samples.audible.de/rt/whyy/011026/rt_whyy_011026_sample.mp3. Digital audiobook in aax.