LearnYouSomeComputer
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@@ -36,7 +36,7 @@ include-before: |
     \footnotesize
     \parindent 0pt
     \parskip \baselineskip
-    \textcopyright{} 2017--2018 Nathan Jarus and Michael Wisely
+    \textcopyright{} 2016--2018 Nathan Jarus and Michael Wisely
 
     \indent
 This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
 
@@ -521,11 +521,13 @@ Granted, that requires... 13?... More keystrokes than `C-f`, but by golly, you c
 
 `M-x` is *very* useful for invoking commands that don't actually have keybindings.
 
+<!-- copyright
 \begin{figure}
 \centering
 	\includegraphics[height=0.3\textheight]{01/mxdonuts}
 \caption{Emacs has commands for all kinds of things!}
 \end{figure}
+-->
 
 #### Moving Around
 
 
@@ -4,6 +4,10 @@
 What is a shell?
 A shell is a hard outer layer of a marine animal, found on beaches.
 
+<!--
+Licensed under CC0
+source: https://pixabay.com/es/mar-shell-almeja-oc%C3%A9ano-1162744/
+-->
 ![A shell.](02/shell.png)
 
 Now that that's cleared up, on to some cool shell facts.
 
@@ -356,8 +356,6 @@ As you code, you see a beautiful person emerge[^emerge] from the field's tall gr
 
 You grimace.
 
-![Grimace](03/grimace.png)
-
 The muse proceeds to explain in great detail how your program can be so much better than it is.
 You agree.
 This is a muse after all.
 
@@ -6,8 +6,6 @@ Despite their modern appearance and ergonomic appeal, some people don't much car
 Truly, it is a mind-bending reality that some people would prefer to use a mouse to click *buttons* rather than typing commands in a shell.
 What a world!
 
-![Ain't that just the way?](06/greg.jpg){ width=60% }
-
 In our first lab, we tried a number of different text editors.
 A couple of those (including Atom and Notepad++) included **graphical user interfaces** (GUIs).
 This means you're free to use your mouse to select text, move text, scroll through text, choose menu action, click buttons, et cetera.
 
@@ -116,7 +116,9 @@ When the linker arrives, it paws through your object files, eats all the cookies
 and then through a terrifying process not entirely understood by humans[^exaggerating],
 leaves you a beautiful executable wrapped up under your tree[^lovecraft].
 
+<!-- copyright
 ![How Executables are Made](07/compile.png){width=70%}
+-->
 
 So, what's the big deal?
 Well, if you compile your code to object files and then change some of your code, you only need to rebuild the object files
 
@@ -12,8 +12,6 @@ Maybe take some extra time on a test.
 Steal a quick bagel for breakfast.
 Rob a bank[^escalation]...
 
-![When you can slow down time, taking candy from a baby is like taking candy from a baby.](08/candy.jpg){ width=80% }
-
 It was all fun up to this point.
 But now you're here: standing in front of at an array of red-hot lasers, trapped in the vault of the Big Bank of New York, wondering where it all went wrong, and wearing a fancy turtle neck.
 At least you look good in a turtle neck.
 
@@ -26,6 +26,11 @@ For one example, the [WannaCry](https://en.wikipedia.org/wiki/WannaCry_ransomwar
 viruses use a memory safety exploit called [EternalBlue](https://www.rapid7.com/db/modules/exploit/windows/smb/ms17_010_eternalblue) "allegedly" developed
 by the NSA and released by "Russian" hackers early in 2017.
 
+<!--
+Image is in the public domain.
+source: https://commons.wikimedia.org/wiki/File:Smokey3.jpg
+-->
+
 ![Smokey Says: "Only You Can Prevent Ransomware"](09/Smokey3.jpg){height=35%}
 
 ### Takeaways
 
@@ -4,7 +4,11 @@
 
 Close your eyes. You are [Donald Knuth](http://www-cs-faculty.stanford.edu/~uno/).
 
-![You, aka Donald Knuth](14/don.png)
+<!--
+Licensed CC-BY-SA 2.5; taken by Jacob Appelbaum (ick)
+source: https://upload.wikimedia.org/wikipedia/commons/4/4f/KnuthAtOpenContentAlliance.jpg
+-->
+![You, aka Donald Knuth](14/don.jpg){height=35%}
 
 The year is 1977, and you have just finished hand-writing the final draft of the second edition of the second volume of *The Art of Computer Programming*.
 You send the draft off to the publisher for typesetting, and the proof that comes back is just horrendous.