Coalition military leaders examine these and other "what-ifs" time and again in "war games" and computer exercises, using "red teams" playing the role of enemy.

CNN: War Strategy: Planners must ask 'What if?'

For most Americans, the Soviets were the great enemy on the playing fields of international sports during this era.

WSJ: Euro 2012: It's OK to Root for Germany

At the moment, there are three Hindi versions of Sleeping With the Enemy playing to packed houses in Indian cinemas.

CNN: Borrowed by Bollywood

In my view, New England fans spoiled rotten, but the Patriots, the Red Sox, the Celtics - and they're playing New York, who, in my view, is the auto-enemy of everything good.

NPR: Really Important Football Game Coming

Demonstrated by Olsson's colleague Hakan Bystrom, it seems more like playing a video game with a cool piece of kit than a weapon capable of blasting an enemy jet out of the sky.

CNN: Hard sell: Marketing missiles not for faint-hearted