Without the war metaphor, trade is just a peaceful, mutually-enriching endeavor between consenting parties.

FORBES: Media Darken Americans' Perceptions of Trade

Indeed, at his confirmation hearing, McCaffrey said that the metaphor of a war on drugs was inadequate - too militaristic and macho.

BBC: The drugs czar

The war on drugs has never seemed less like a metaphor.

ECONOMIST: Drug violence in Mexico

He saw the ship as a metaphor for the nation's post-war strength, pride and accomplishment.

CNN: Sending out an SOS for 'America's flagship'