a href="http://www.nytimes.com/2009/07/31/sports/31xgames.html?partner=rssnytemc=rss"img src="http://graphics8.nytimes.com/images/2009/07/31/sports/xgames75.jpg" border="0" height="75" width="75" hspace="4" align="left"/aAfter the death of Jeremy Lusk, a top freestyle rider, a group of riders and action sports industry figures is trying to mitigate some of the risks of Motocross. More...