chemical weapons

To this question, James Mattis once famously answered, "Nothing. I keep other people awake at night." But not everybody is as courageously confident as this General. So what are the top health and safety concerns on the minds of security officials? Let's take a look.
Researchers have once again turned to nature for inspiration: A team of chemists working for the U.S. Air Force used crystals extracted from butterfly wings to detect trace chemical warfare agents.