Members of the Marine Innovation Unit, along with the Army Corps of Engineers, discuss the conducting of a controlled detonation on a new 3D-printed concrete structure at Camp Atterbury, Indiana, October 19, 2023.This follow-on engagement demonstrates an experimental form of construction which uses 3D printing using liquid concrete to manufacture deliberate, sustainable construction and recovery, and update service policies to support increasing use of local and tactical manufacturing. (U.S. Marine Corps photo by Cpl. Jonathan L. Gonzalez)