Who knows maybe they landed hard and the cargo became unsecured. We know adding fuel wouldn't do that to the aircraft on climb out. We also know that slat retraction issues have happened. It's also a war zone and If I had a first guess I would hazard sabotage of some sort. Not hard for a ground crew to cock up that aircraft, especially with airline crews that don't do walk arounds. For all we know they weren't producting enough power as well. When I ponder a load shift, it happened to Emory in Sacramento. What ever the case, someone dropped the ball, didn't do their jobs.