http://assets.espn.go.com/i/tvlistings/tv_espn_original.gif en-us 10 ESPN Inc. http://espn.go.com/ Copyright 2010 ESPN Inc. Notoriously reactive NASCAR got proactive with its drug-testing policy. And that's a very good thing, writes Marty Smith.]]> January 07, 2009 04:31:09 PST