That's how escalation works. Ceilings become floors. Gradually.

A few times since last fall, the Obama team has floated rising numbers for how many additional U.S. soldiers will be sent to Afghanistan. Now, deployment of 21,000 more is a done deal, with a new total cap of 68,000 U.S. troops in that country.

But "escalation" isn't mere jargon. And it doesn't just refer to what's happening outside...