A draft MIDEX Explorer Program Library, including launch vehicle costs and capabilities, is available for community comment. The MIDEX Explorer Program Library contains supporting documentation for the next proposing opportunity in NASA's series of Medium-Class Explorer (MIDEX) missions. The draft MIDEX Explorer Program Library may be found at http://explorer.larc.nasa.gov/explorer/mel.html Comments would me most helpful if received by April 13, 2001. Comments and questions should be directed to Paul Hertz, Explorer Program Scientist, Code SR, NASA Headquarters, Washington, DC, 20546; (phone) 202-358-0986; (FAX) 202-358-3097; (e-mail) paul.hertz@hq.nasa.gov . Subscribe: send blank e-mail to oss-research-subscribe@yahoogroups.com Unsubscribe: send blank e-mail to oss-research-unsubscribe@yahoogroups.com Space Science home: http://spacescience.nasa.gov/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/