diff -r e4a2807ac7f2 -r 7d4aa41b748e slides/slides02.tex
--- a/slides/slides02.tex	Tue Oct 04 22:56:04 2016 +0100
+++ b/slides/slides02.tex	Wed Oct 05 08:50:44 2016 +0100
@@ -587,7 +587,7 @@
 
 \begin{itemize}
 \item acquired a machine from an anonymous source\medskip
-\item they try to keep secret the source code running on the machine\medskip\pause
+\item they tried to keep secret the source code running on the machine\medskip\pause
 
 \item first reversed-engineered the machine (extremely tedious)
 \item could completely reboot the machine and even install a virus that infects other Diebold machines