--- a/text/intro.tex	Sun Feb 06 20:54:10 2011 -0800
+++ b/text/intro.tex	Tue Feb 08 07:13:42 2011 -0800
@@ -555,6 +555,7 @@
 and
 Alexander Kirillov
 for many interesting and useful conversations. 
+\nn{should add thanks to people from Teichner's reading course; Aaron Mazel-Gee, $\ldots$}
 During this work, Kevin Walker has been at Microsoft Station Q, and Scott Morrison has been at Microsoft Station Q and the Miller Institute for Basic Research at UC Berkeley. We'd like to thank the Aspen Center for Physics for the pleasant and productive 
 environment provided there during the final preparation of this manuscript.