DARPA Launches Subterranean Challenge January 5, 2018/Client: FEDweek, Uncategorized /by spireco1DARPA Launches Subterranean Challenge spireco1 https://spirecommunications.com/wp-content/uploads/2017/12/SpireLogo-300x138.png spireco12018-01-05 15:45:422018-01-26 19:48:22DARPA Launches Subterranean Challenge