Here is an interesting optimization problem: it turns out the most polluting part of a conference is people taking jets to fly to the conference. Minimize that and the planet wins. Favors hub cities over spokes, like San Diego or Prague, where you "can't get there from here", no matter where "here" is. See http://www.sciencemag.org/cgi/reprint/318/5847/36.pdf Notice: This email message, together with any attachments, may contain information of BEA Systems, Inc., its subsidiaries and affiliated entities, that may be confidential, proprietary, copyrighted and/or legally privileged, and is intended solely for the use of the individual or entity named in this message. If you are not the intended recipient, and have received this message in error, please immediately return this by email and then delete it. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf