>>2612138. 3296
https://m.youtube.com/watch?v=RZjhxuhTmGk
800kmh is a pretty fair clip and that concrete appears to have kept it out.
https://www.realclearpolitics.com/video/2018/05/15/rand_paul_i_want_to_know_what_haspel_knows_about_the_surveillance_of_the_trump_campaign_if_cia_was_involved.html
Sen. Rand Paul (R-KY) expressed his concern of CIA director-designate Gina Haspel's involvement in a surveillance campaign of Donald Trump's 2016 presidential campaign and her relationship with former director John Brennan in an interview with FOX News' Neil Cavuto on Tuesday.
Iirc 14 inch steel/iron tunes 39 inch centers. Concrete behind. Lots of steel for floor decking.