In my ongoing attempt to analyze rail suppliers, I thought I'd turn my attention to Westinghouse AirBreak Technologies Inc. (WAB). I've always been a fan of the company's diversified business, and in particular I'm a fan of positive train control. Additionally, this is a particularly exciting time given the acquisition of GE's transportation assets. Such a union has the potential to produce a powerhouse that dominates both locomotives and support systems. Successful investment isn't about excitement, though. It's about buying assets that offer a positive risk reward for investors. My problem here is