[James Brown]

Looks to me that the fan part of the turbofan let loose from ingestion of a bird or piece of cowling which causes other blades to fail and on and on till they shut it down. Not sure if you CAN shut a engine down on climb out like the C-5, shutting down an engine that has a fire or is malfunctioning will make the aircraft unstable leading to uncontrolled rolling. In other words, better to land and let the ground crews handle the fire than crash in a big hole and loose everything. Yeah, that wing is going to take some time to fix!!