Rio+20 Conference on Sustainable Development, "Rio+20," will be held in Rio de Janeiro, Brazil, from June 20-22, 2012.  The conference will be preceded by the third Preparatory Committee meeeting of the Conference from June 13-15.  Registration is now open and will close on May 20.  All attendees must be registered by the UN Observers, Rosalee Keech (unobserver@lwv.org).  For information on the conference, please link to http://www.uncsd2012.org/registration.