The Defense Advanced Research Projects Agency (DARPA) wants the bomb you've been tinkering with at home. DARPA's latest initiative is identifying emerging threats by mining everyday technologies. According to the agency's press release, this effort, called Improv, "asks the innovation community to identify commercial products and processes that could yield unanticipated threats." So DARPA wants that homemade bomb you've been building in your garage.
The Department of Defense would like remind potential contributors that they should only build weapons within the bounds of their local, state, and federal laws.