\documentclass[12pt]{article}
\usepackage{graphicx}   %%%%%%%%%%%%%%%
\begin{document}
\title{An Example Manuscript}
\author{Cemal Yalabik}
\date{\today}
\maketitle
\abstract{This is where I put a summary of what I have written about}
\section{This is the First Section}
Things I write in the first section
\section{Second Section}
\subsection{A subsection}
This is an example of a subsection.


\begin{figure}[h!]
	\begin{center}
		\includegraphics[keepaspectratio=true,scale=0.8]{Bilkent_logo.jpg}
	\end{center}
\caption{\label{fig:epsart} The Bilkent logo }
\end{figure}

\end{document}