Tattoos and the military seem to go together. Many U.S. soldiers get ink to commemorate their service or fallen comrades. And the tattooed Navy sailor is part of American folklore. But can a tattoo actually prevent you from serving your country?
One U.S. Army leader says robots could account for a significant portion of American fighting forces in the next 20 years or so. Find out how machines are waging war now and how they may change the face of battle in the decades to come.
From constructing bridges to blowing them up, combat engineers must have a head for spatial thinking and a heart that isn't faint. Ready to learn about these military enlistees who are as much action as they are equation?
Sarin has no taste, no color and no odor. It's a human-made nerve agent, and only a tiny amount can cause serious harm. Where did this dangerous substance come from, how does it work, and how can investigators test for it?
Formerly known as "shell shock," research into post-traumatic stress disorder began intensely after Congress requested a study of how Vietnam veterans were readjusting to civilian life in 1983. What have we learned since then about PTSD?
Since the 9/11 terrorist attacks, an estimated 54 other attacks on the U.S. have failed. And these are only the ones we know about. Some, like the underwear bomber and the shoe bomber, live on in infamy. Others are more obscure.