OP-ED CONTRIBUTOR Washington JUST a couple weeks ago, politicians and pundits were pointing to the sudden reduction in the number of assaults on coalition forces in Iraq and speculating about the collapse of the insurgency. After all, attacks had decreased to fewer than 40 a day from a high of 140 a day just before the Iraqi presidential election in January. On April 10, Pentagon spokesmen began whispering to reporters about plans for an early withdrawal of American forces. In contrast, the last week's papers have been full of reports about the increased sophistication of insurgent attacks on Americans, the...