The 2001 anthrax attacks, the first bioterrorist attacks in the United States, took five lives. Mail was stopped in several cities and it cost more than $1 billion to clean up the spores. So where does the U.S. stand if it's attacked again?
Landmines are a deadly legacy of 20th century warfare. Independent sources report that since 1975, landmines have killed or maimed more than 1 million people during peace time. Learn about the technology of landmines and their deactivation.
Gathering reconnaissance during battle typically puts small teams of soldiers in harm's way. Tiny robotic flyers, called micro air vehicles (MAVs), could do away with this danger. Learn all about spy flies.
On a television drama last week, the plot involved photos taken of a Russian missile silo, and the characters mentioned a "keyhole satellite." What is a keyhole satellite and what can it really spy on?
Nine countries can now deliver nuclear warheads on ballistic missiles. At least three of those countries -- the U.S., Russia and China -- could strike any target anywhere in the world. Do you know what makes a nuclear bomb so deadly?