Steve M posted a link to the audio of John Christy's presentation to the Interacademies Council a couple of days ago. For those of us who prefer the written word, Marcel Crok has now posted a transcript. You need to scroll through the Dutch to get to Christy's words in English.
I liked this bit:
A fundamental problem with the entire issue here is that climate science is not a classic, experimental science. As an emerging science of a complex, chaotic climate system, it is plagued by uncertainty and ambiguity in both observations and theory. Lacking classic, laboratory results, it easily becomes hostage to opinion, groupthink, arguments-from-authority, overstatement of confidence, and even Hollywood movies.