tional) Sandbox Mode, with <em>everything</em> available. (scroll to see all controls) Simulate &amp; play around to your heart&#39;s content:</strong></p>

	<div class="sim">
	        <iframe src="sim/?stage=SB&format=sb" width="800" height="540"></iframe>
	</div>

	<p>This basic &quot;epidemic flight simulator&quot; has taught us so much. It&#39;s let us answer questions about the past few months, next few months, and next few years.</p>

	<p>So finally, let&#39;s return to...</p>

	<div class="section ch