What was in the sky over the southwest?

<div class="meta image-caption"><div class="origin-logo origin-image none"><span>none</span></div><span class="caption-text">A brilliant bright light seen streaking in the night sky over the Southwest was most likely a fireball - a fragment of an asteroid that entered Earth&#39;s atmosphere, a NASA scientist said. </span></div>
September 15, 2011 6:42:03 AM PDT