Yeah, profiling doesn't work according to Chertoff. But the Nigerian had a one way ticket (red flag), purchased with cash (red flag), no checked luggage (red flag), and took a window seat (red flag), and one of his legs was through Yemen (red flag). I guess profiling on the basis of these flags would have been positive IMO.

I thought that was one of the reccommendations of the vaunted 9-11 Commission, red flagging these types of travelers.