NASA can take online feedback at the following site http://www.nasa.gov/about/contact/ask_nasa_form.html
for those who would like to suggest that NASA use the metric system for the Constellation Program. (They backed off of an earlier metric commitment, in case someone does not know, see http://www.newscientist.com/article/dn17350-nasa-criticised-for-sticking-to-imperial-units.htm) Don USMA Webmaster USMA list owner
