Believe it or not, helmets reinforced with metal were used by the Sumerians and Akkadians as far back as 2300 B.C.E., and Mycenaean Greeks used bronze helmets (typically quite heavy) in 1700 B.C.E.

But it’s also been a secret in another way. During World War II, military leaders and Hollywood came together to protect the airport under “Operation Camouflage.” Why the disguise?

In 1917 people were astounded by harbours full of colourful ships. But some of the visual impact of Wilkinson’s camouflage is lost today in the black and white images we have of World War One.

They're donning helmets, camo and tactical vests, and they have an insignia of an eagle eating a snake. But Hamas, too, has videos. (SOUNDBITE OF MUSIC) BATRAWY: In this, Hamas fighters scope out some ...

Tens of thousands of people have been killed in Gaza by Israeli strikes over these past 20 months of war, a war which began with a deadly Hamas attack on Israel. Gaza now lies in ruins. The leaders of ...