Most passenger jets today fly under computer control, at least to some extent. Usually, those computers make flying safer. But like any machine, they can sometimes break down, leading, in rare cases, to major accidents. In this interview, aviation expert Bill Voss explains why he thinks airlines should put more emphasis on solving computer automation problems during pilot training. Podcast produced by David Levin. NOVA is produced by WGBH in Boston. Funding for NOVA is provided by David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers. Hear more audio stories at pbs.org/nova