<p>Armstrong stepping onto the moon's surface </p>
<p>Neil Armstrong</p>
<p>Armstrong's iconic photograph of Buzz Aldrin on the moon</p>
<p>A footprint on the moon</p>
<p>The NY Times <a href="http://www.nytimes.com/learning/general/onthisday/big/0720.html">front page from the time</a></p>