feat(dissertation): improve on checklist section in background

pub/dissertation/chapters/background.tex

@@ -24,15 +24,32 @@
 % - Safety procedures being added
 % - Rates of accidents
 \begin{itemize}
-  \item 70-80\% of aviation accidents are attributed to human factors~\cite{faa-reasons}
+  \item 70-80\% of aviation accidents are attributed to human factors~\cite{faa:reasons}
 \end{itemize}
 
 \subsection{Checklists}
 \begin{itemize}
   \item Checklists have been shown to aid in minimizing human errors~\cite{manifesto}
-  \item However, checklists can be misleading and compromise the safety of the aircraft
-    due to them being either too confusing or taking too long to complete~\cite{nasa-design}
+  
+
+  \item However, according to the Civil Aviation Authority (CAA), the UK's aviation regulator:
+  \begin{itemize}
+    \item Checklists can be misleading and compromise the safety of the aircraft
+      due to them being either too confusing or taking too long to complete~\cite{nasa:design}
+    \item Other problems may include the crew skipping a step either unintentionally or by interruption,
+      or just failing to complete the checklist outright
+    \item The crew may also not be alerted to performance issues within the aircraft,
+      that running the checklist may cause~\cite{caa:design}
+  \end{itemize}
+
   \item That is why testing checklists are important to avoid these situations
+  
+  \item However, it is important to note that checklists does not prevent the human
+    factor of failure to use a checklist, like in the case of Northwest Airlines
+    Flight 255, where the National Transportation Safety Board (NTSB), an investigatory board
+    for aviation accidents in the United States, determined that
+    \enquote{the probable cause of the accident was the flight crew's failure
+    to use the taxi checklist to ensure that the flaps and slats were extended for takeoff.}~\cite{ntsb:NWA255}
 \end{itemize}