The 2016 car bomb found near Notre Dame. IOW, it was a target.
https://www.telegraph.co.uk/news/2016/09/07/gas-tanks-found-in-unmarked-car-by-paris-notre-dame-cathedral-sp/?WT.mc_id=tmg_share_fb&fbclid=IwAR1wokMa-bRrFfthcuj0a9VzBRCJBcAIx7amZjIzL-mGkvasoMX2dM1qedA
Not unlike earlier attempts to bring down the WTC.