Ostriches don't stick their heads in the sand when they're afraid. That's a myth. If they really did stick their heads in the sand, they'd have long since all been eaten by cheetahs, and we'd be talking about "the extinct ostrich" with that same tone of voice we use when we talk about the dodo bird.
In this New York Times article, Dr. James Hansen, NASA's top climate scientist, has charged the Bush administration is trying to keep him from giving warnings about global warming. The article also says there have been similar restrictions on scientists at NOAA.
If this is what's really going on, it needs to stop. I've written before about Philip Cooney, the administration official who resigned over allegations he was watering down reports about global warming. (Here and here.) The cheetah's coming. How we react is up to us, but if we stick our heads in the sand, some day someone will be talking about us with that same tone of voice they reserve for the dodo bird.