DARPA Selects 3 Teams to Demo Rapid Underground Tunnel Drilling April 2, 2020/Client: DARPA /by Beth Boyterhttps://www.defenseworld.net/news/26641/DARPA_Selects_3_Teams_to_Demo_Rapid_Underground_Tunnel_Drilling https://spirecomm.com/wp-content/uploads/2018/01/defenseworld.png 45 125 Beth Boyter https://spirecommunications.com/wp-content/uploads/2017/12/SpireLogo-300x138.png Beth Boyter2020-04-02 19:22:532020-04-08 19:23:54DARPA Selects 3 Teams to Demo Rapid Underground Tunnel Drilling