The US Defense Advanced Research Projects Agency (Darpa) is on the hunt for technology or a material that could be packed into a cylinder and rapidly deployed to block access to a specified area.
The brief -- titled Block Access to Deny Entry (BlockADE)—suggests it could be a "web, wall, blockade or barrier" and just needs to be able to launch automatically (go-go gadget WALL!), "without human intervention." "Darpa envisions a compact system filled with a material and/or device that when remotely triggered can expand by orders of magnitude to form a structure to prevent ingress or egress by a person/people," Darpa explains.
The innovation agency is interested in both structures that can be deployed from a single point source to prevent someone from accessing a particular object (by filling a room with some sort of flexible structure) and structures that could instantly create a fence or wall around something, made out of multiple point sources.
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