In the What-We-Know column:
We know that the war in Iraq is not a "war on terror."
We know that the loss of 2,600 good Americans, the injuries of 19,000 others and the wartime expense of $320 billion have been a tragic waste.
We know that because of the cost of Iraq, measures that might truly enhance homeland security, like technology that would spot sinister liquids at airport checkpoints, are hardly affordable.
We know that while the president has cut taxes for the rich, at a time when he says all Americans must do their part, U.S. borders are porous, cargo ships are vulnerable and sophisticated identity scanners remain a fantasy.
Yes, there is much that we don't know. What we do know, based on the foiled plot against U.S.-bound aircraft, is that five years of policies by George W. Bush and the Republicans who control Congress have made the country no more secure and its people no more safe. It is time for a change.