The 2011 IASS Annual Symposium is being jointly organized with IABSE with the theme "IABSE-IASS 2011: Taller, Longer, Lighter."  It will be held in central London 20-23 September, and will also incorporate the 6th International Conference on Space Structures usually held at Surrey University.  Special attention will be paid to the structures for the 2012 London Olympic Games.