Mark Z. Barabak @markzbarabak
RT @DavidLauter: Half a century ago, the @NTSB first proposed an automated system to prevent rail collisions. This week, it finally became… — PolitiTweet.org
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Sat Jan 02 23:43:02 +0000 2021
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Mark Z. Barabak @markzbarabak
RT @DavidLauter: Half a century ago, the @NTSB first proposed an automated system to prevent rail collisions. This week, it finally became… — PolitiTweet.org