http://halturnerradioshow.com/index.php/news/u-s-national-news/1807-antifa-under-investigation-for-seattle-tacoma-train-derailment
There are some open questions on the WA rail sabotage.
Antifa may think they deleted their article, but it can still be found here:
https://web.archive.org/web/20170504174533/https://itsgoingdown.org/olympia-wa-train-tracks-sabotage-stop-fracking-equipment
The article was published on April 20. Wayback first captured the article on May 5. The last capture was on August 25.
The article claims that they warned the rail company.
Did they actually do this?
Did the company receive the warning?
Did the rail company investigate?
Was the problem remedied at the time?
If so, could someone else have subsequently sabotaged the rail line again?
I don't think this is open and shut.