There is not an unlimited supply of money, sophisticated leaders, or countries willing to risk American military action by aiding and abetting international terrorism. A number of countries have begun cooperating, making this one of the largest international operations ever to be called "unilateral."
There may not even be an unlimited supply of potential suicide bombers in "the Arab street," now that Saddam Hussein is no longer there to subsidize the families of suicide bombers who kill civilians in Israel or to provide sanctuary for other terrorists.
Critics of the Bush administration may keep saying that there is no connection between Iraq and terrorism but the terrorists themselves seem to believe otherwise. Why else are they pouring into Iraq, in what they themselves have characterized as a crucial battle to stop the Americans from reconstituting that country in ways that will make their plans for the region harder to carry out?
There is a cost to this war as there have been costs to all wars, including the Cold War. And there have been painful setbacks and surprises in this war, as there have been in all wars.
George Washington lost most of the battles he fought but we still came out of it as a new and independent nation. But there were grownups in that war and in our other wars.
The big question today -- and for our future -- is not whether our enemies have unlimited resources but whether we have an inexhaustible supply of immaturity in our media and among our politicians.