a fa-twitter"></i>Piazza</a></li>
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        </div>
        <!-- /.navbar-collapse -->
    </div>
    <!-- /.container -->
</nav>
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    <div class="portfolio-modal modal fade" id="portfolioModal1" tabindex="-1" role="dialog" aria-hidden="true" style="padding-right:0px; overflow: hidden;">
        <div class="modal-content">
            <div class="close-modal" data-dismiss="modal">
                <div class="lr">
                    <div class="rl">
                  