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Front page of the New York Times, February 8, item titled "Loss of copters suggests change in Iraqi tactics: 6 crashes over 3 weeks; US says insurgents are putting new emphasis on downing aircraft."

These two sentences in the report:

"Some aspects of the recent crashes indicate that insurgents have become smarter about anticipating American flight patterns and finding ways to use old weapons to down helicopters, according to military and witness reports. The aircraft, many of which are equipped with sophisticated antimissile technology, still can be vulnerable to more conventional weapons fired from the ground."

In other words, the US has upgraded its stuff, like all of us good Microsoft-ed and Apple-d people do regularly. But those uncooperative Iraqi insurgents? They haven't upgraded. They're still operating the old equipment.

No wonder there are incompatibilities and crashes.

Besides, I wonder what emphasis the insurgents had earlier, concerning aircraft. What could they have been focused on that isn't about downing flying firing machines in the sky?