South Tower collapsing. See the ring of explosions at the fracture line. <br /><br />From: <br /><a class="link" rel="nofollow" href="http://911research.wtc7.net/wtc/analysis/collapses/explosions.html">http://911research.wtc7.net/wtc/analysis/collapses/explosions.html</a> <br /><a class="link" rel="nofollow" href="http://www.911research.com/wtc/evidence/videos/docs/south_tower_collapse.mpeg">http://www.911research.com/wtc/evidence/videos/docs/south_tower_collapse.mpeg</a>
