Endeavour minus her Main Engines, OMS (Orbital Manuevering System) pods and her FRCS (Forward Reaction Control System) pod. In preparation for relocation from OPF Bay 1 to VAB Highbay 4.
OMG! What have they done to my baby?!
To be honest Endeavour is in a post flight configuration here. After a mission all the missing components you don't see here are taken off the airframe for refurbishment. For the museum display configuration all the missing components will be replace with inert replicas.
This is kinda sad to see