Delagation writes letter to WMATA "demanding' complete listing of power cable connector insulators that are missing system wide. Evidently NTSB found this a cause of the tunnel fire.
http://www.scribd.com/doc/268178642/NCR-Reg-Del-Letter-to-Metro-Re-NTSB-Wiring-Recs-FINAL-06-09-15
Now a question would be is how many third rail systems do not have these insulators ?
Now is on NTSB's hot seat.
https://www.washingtonpost.com/local/trafficandcommuting/ntsb-metro-knew-of-potentially-dangerous-track-conditions-more-than-a-year-before-july-derailment/2016/12/01/5d57c13a-b7ff-11e6-b8df-600bd9d38a02_story.html?utm_term=.8216692dc255#comments
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