Bomb technicians are currently clearing a house in Escondido, California containing the largest cache of certain homemade explosives ever found in the U.S. Among other weapons, the stash includes 9 pounds of suicide bomber-favorite HMTD.
You're looking at a bomb. In 1986, Discover magazine reported on the hypothetical risks of PETN, an explosive that could be used as a covert bomb. Now, explosives are stuffed in dogs. Below, a history of improvised destruction.
Terrorists are running out of places to put their bombs—even shoes are off limits now. So where do you stick explosives these days? Here's a look inside the deviously clever design of printer bombs that made recent headlines.