Two chemical devices have exploded at Los Angeles International Airport since Sunday; two more have been found intact.
An 18-year-old Arizona high school student was arrested Tuesday after a cleaning lady found what was later determined to be an improvised explosive device (IED) while going about her duties in a home.
Technology helps rebuild warfighers' faces.
Home security cameras show men place "acid bomb" on homeowner's front porch.
Inspired by that snuffling wet lump at the end of your dog's face, a new chip can rapidly identify trace amounts of TNT.
Police are investigating non-specific threat across the country