U.N. Weighs How to Answer a Knock on Earth's Door http://www.nytimes.com/2010/10/09/world/09nations.html United Nations Office for Outer Space Affairs http://www.oosa.unvienna.org/ SETI Institute: Allen Telescope Array http://www.seti.org/ata Extraterrestrial Intelligence in the Solar System: Resolving the Fermi Paradox http://www.rfreitas.com/Astro/ResolvingFermi1983.htm Voyager "The...