I don't fault the engineers. They are expected to testify to the truth, so the problems can be fixed.
But I am faulting the US Congress for having such hearing in the open, knowing the things that will be discussed and revealed.
There's nothing in that article that someone with an internet connection wouldn't be able to find out for themselves. I'd say the value of alerting the public to the fact that or borders--after nearly four years--are STILL wide open to attack--far outweighs any risk of releasing sensitive information.
The terrorists already know this stuff. WE are the ones who need to be informed about it.