We took the lessons we learned at Genesis, and we went through a very rigorous and extensive process of looking at the Stardust sample return capsule, digging out the blueprints, going through all the testing that was done pre-launch. We're convinced that that is not going to happen on Stardust. But there is some residual risk that something can happen on return. We think the probability of that is very low at this point.
— Ed Hirst
ExtensiveGenesisLearned