1. Battle Gear.

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.