Tween 2 MCs at same time? AS3/CS3

Is it possible to Tween more than one Movie Clip at a time? It seems to allow one to run at a time.

I have a project that I’m dynamically creating Movie Clips into a holder (another Movie Clip). I want to fade one in and another out at the same time. I’m dynamically creating them as I never know how many I will have (maybe 6, maybe 20).

I’m adding them to the holder like this:


And I’m accessing them like this: