This was an unprecedented impact to what's called the “core” of the network. The core of the network you can think of as the brain of the network that controls all access of flow of information and flow of connectivity for all services to the Internet.
We have extensive...over two years in this particular program, with full rigour, full review and full analysis that was done. The implementation was part of a seven-stage program, and this was stage six. The previous five stages had no issues whatsoever.
This was truly an unprecedented incident. We have very thorough reviews, very thorough simulations and very thorough testing, but this was an unprecedented incident.