From battle armor to bubble gum, you might be surprised by what soldiers have carried into battle--and what they'll carry in future wars. In this look at the development of weapons--from the Roman soldier's gladius to the M16 assault rifle to infrared scopes and biological weapons protection--we also discover the evolution of body armor--from knights to Kelvar-protected "Land Warriors". And we'll also find out what the "Future Warrior" will look like.