> "During inspections there were more variations across the heat shield than we expected," said Howard Hu, the Orion program manager for NASA. "Some of the char

> "During inspections there were more variations across the heat shield than we expected," said Howard Hu, the Orion program manager for NASA. "Some of the charred material ablated away differently than what our computer models, and what our ground testing, predicted. More of this charred material was liberated during reentry than we had expected."