I don't entirely understand the NW & CO relationship. While I know that NW is a partial owner in CO, they do some very strange things in their business with each other... for instance, NW & CO have recriprocal Elite agreements to give each others elites free upgrades as if they were their own however at the same exact time they have this little spat about 50% eqms on cheap fares flown on the others airline... Now the Eva ff agreement with CO and the CI agreement with NW... they are like a teenage brother and sister.