Placing figures side-by-side without using any fancy packages. Code based on Sec.1 of http://ftp.math.purdue.edu/mirrors/ctan.org/obsolete/macros/latex/contrib/subfigure/subfigure.pdf

tex-subfigure

 \begin{figure}
    \centering
    \parbox{.4\textwidth}{%
      \includegraphics{img/SE-Discussion}
      \caption{First.}%
      \label{fig:2figsA}
    }%
    \qquad 
    \begin{minipage}{.4\textwidth}%
      \includegraphics{img/SE-Discussion2}
      \caption{Second.}%
      \label{fig:2figsB}%
     \end{minipage}%
   \end{figure}%