diff -r 38d2f6f1c9d8 -r 31e879c6cbc1 slides03.tex
--- a/slides03.tex	Tue Oct 09 20:36:06 2012 +0100
+++ b/slides03.tex	Tue Oct 09 20:37:45 2012 +0100
@@ -659,7 +659,7 @@
 
 This question might seem basic, but a surprising number of people never ask it. The question involves understanding the scope of the problem. For example, securing an airplane, an airport, commercial aviation, the transportation system, and a nation against terrorism are all different security problems, and require different solutions.
 
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+\only<2>{
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