--- a/slides/slides03.tex	Wed Oct 07 18:03:32 2015 +0100
+++ b/slides/slides03.tex	Thu Oct 08 12:08:10 2015 +0100
@@ -331,7 +331,7 @@
 \frametitle{Starting a Shell}
 
 \small
-\lstinputlisting[language=C,numbers=none,xleftmargin=-6mm]{../progs/o1.c}
+\lstinputlisting[language=C,numbers=none,xleftmargin=-6mm]{../progs/o2.c}
 
 \begin{textblock}{7}(5,7.5)
 \begin{bubble}[7cm]
@@ -361,6 +361,24 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%   
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}[t]
+\frametitle{String from the Web}
+
+{\small
+\lstinputlisting[language=C,numbers=none,xleftmargin=-6mm]{../progs/o1.c}}
+\bigskip\bigskip
+
+\noindent 
+More ``interesting'' shell programs can be found at 
+
+\begin{center}
+\url{http://shellblade.net/shellcode.html}
+\end{center}
+  
+\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \begin{frame}[c]
 \frametitle{Overflow.c}
 \mbox{}\\[-10mm]