image wrong place

Question

Latex shows the following code in this order:

Fig1

Conclusion

Fig2

\begin{figure}[h!]
\centering
\includegraphics[width=140mm]{fig1.png}
\caption{fig 1}
\label{fig:f1}
\end{figure}

\begin{figure}[h!]
\centering
\includegraphics[width=140mm]{fig2.png}
\caption{fig 2}
\label{fig:f2}
\end{figure}

\section{Conclusions}\label{conclusions}
conclusion goes here

Even changing h to H is not much better:

Conclusion

Fig1

Fig2

Answer 1

I finally found the answer. The problem is that the images could not be fit into one page. by resizing them, they became fine:

\includegraphics[width=140mm]{fig2.png}

to

\includegraphics[width=100mm]{fig2.png}

Answer 2

Try using the float package. I put a minimum example below. I have now used the H option along with specifying a height for the pictures which is too large for two pics and conclusion to fit on one page. The figures now come first and the conclusion follows.

\documentclass[10pt,letterpaper]{article}
\usepackage{float}
\usepackage[demo]{graphicx}
\begin{document}
\begin{figure}[H]
\centering
\includegraphics[height= 80mm,width=140mm]{fig1.png}
\caption{fig 1}
\label{fig:f1}
\end{figure}

\begin{figure}[H]
\centering
\includegraphics[height= 80mm,width=140mm]{fig2.png}
\caption{fig 2}
\label{fig:f2}
\end{figure}

\section{Conclusions}\label{conclusions}
conclusion goes here
\end{document}

Note: I used the demo option of the graphicx package as I did not have your images and I guessed a picture height.