Directorios

Enlace: http://www.pbs.org/wgbh/nova/barrier/

Descripción: PBS NOVA Online.
«It's been 50 years since test pilot Chuck Yeager broke the sound barrier. Bookmark this site to hear Yeager and others describe those early days, to discover what creates a sonic boom, or to find out about the latest attempts to beat speed records on land, water, and in the air.»