First off, condolences to the families of the dead.
If high speed rail, I'll be interested to see what the investigation finds and if there were, it being new, any construction defects. I'll assume WA built for similar reasons to why CA is building theirs. I just saw CA is already coming in at way over the original estimates for being way over budget. I can't help but think that might end up causing some construction shortcuts that lead to something similar on that train's first runs.