Reply #56: You are hilarious. Oh, and since you are supposedly an aeronautics engineer-

[KittyWampus]

how about that Columbia space shuttle.
"
NASA's Shuttle safety regulations stated that external tank foam shedding and subsequent debris strikes upon the Shuttle itself were safety issues that needed to be resolved before a launch was cleared, but launches were often given the go-ahead as engineers studied the foam shedding problem without a successful resolution. The majority of Shuttle launches recorded such foam strikes and thermal tile scarring in violation of safety regulations.<2> During re-entry of STS-107, the damaged area allowed the hot gases to penetrate and destroy the internal wing structure,<3> rapidly causing the in-flight breakup of the vehicle. A massive ground search in parts of Texas, Louisiana and Arkansas recovered crew remains and many vehicle fragments."