Easy.
There's a difference between free and unfettered access for inspectors, and tanks running up and down your roads, shelling your civilians and launching rockets into crowds at a market.
Hard to see anything from a tank.
No need for tanks UNLESS there isn't free and unfettered access.
What they're asking for is not inspections, but military occupation. There's a difference.
Arf (and GWB has already committed unauthorized acts of war against Iraq. They'd be legally justified to strike back. Native Americans are darned lucky their reservations didn't sit on top of oil.)