NW & KLM have combined operations to such an extent, that somebody high up in the chain of management at NW said (sometime last year) that it didn't matter to NW's bottom line, whether a passenger flew in a red tail or a blue and white one, across the Atlantic.
With this is mind, how come BOTH, KLM and NW, fly several flights between their hub cities? For Example, there are 4 daily non-stops between DTW & AMS, three operated by NW and one by KLM. If these two airline's operations are so well combined, why is there a need for KLM to augment NW's flights from Detroit and Minneapolis to Amsterdam? KLM could, instead, fly to (for example, only) Kansas City or Denver, and open up more direct routes to Amsterdam, thus expanding both their's as well as Northwest's Direct-Route International Network, could they not?