Nothing could prevent the Americans from invading Iraq. The only superpower country in the world, however, seems to be losing another war. Its currency, the greenback, is getting weaker in its fight with the euro—the common currency introduced in 2000 for members of the European Union. The US dollar has been losing ground against the euro since December 2000 and suffered its worst dip on March 10 when the euro closed at 1.1062 against