There's always a lot of talk that RJ's take away mainline jobs. Isn't the use of an RJ more the function of market demand and mainline vs. regional costs? Take CVG for example. There are a lot of wingtip flights. The costs of operating a single mainline flight were too high to make a single M80 flight profitable while two RJ's could be operated profitable. Now, many of these CRJ900s will replace some of those wingtip flights which is a great thing. How is it presumed that mainline flights are losing?