<a href="http://api.tweetmeme.com/share?url=http://sports.espn.go.com/nba/news/story?id=6554138&campaign=rss&source=NBAHeadlines& service=bit.ly&source=espn"><img style="padding-left:10px;" align="right" border="0" style="border:none;" src="http://api.tweetmeme.com/imagebutton.gif?url=http://sports.espn.go.com/nba/news/story?id=6554138&campaign=rss&source=NBAHeadlines" height="49" width="41" /></a>Charles Oakley, one of the NBA's all-time tough guys and now a Charlotte Bobcats assistant, has sued a Las Vegas resort over what he calls a May 2010 "gang-style beat down" by security guards who injured him.