Dragon quotes the GISS, but a neighboring thread shows how Hansen has been doctoring the GISS data.
GlobalAirTemp
Global Warming and Predictions of an Impending Ice Age: Global Warming Since 1998 — A blog on Environmental Happenings by Dean Bill Chameides
What has global warming done since 1998?
One need not be limited to a single data source.
You know, there's an interesting pattern to denialist assertions. They read like a lawyer's brief, not a scientist's argument. Here's what I mean.
A lawyer in court to defend a client might say, "My client was not at the scene of the murder. But if he was, the murder weapon was not his. But if it was, it was stolen by the real killer. But if in fact my client pulled the trigger, he acted in self-defense."
Now, these assertions are in some cases mutually exclusive. If the accused was not at the scene of the murder, then he could not have killed the victim in self-defense. But they are all united by a single goal: to achieve a verdict of innocent.
Similarly, the denialist assertions go something like this.
"The planet is not warming. But if it is, then human activity is not the cause. But if human activity is the cause, the results will be trivial. But if the results will not be trivial, then they are beneficial. But if the results will be bad, we cannot do anything about it without destroying the economy. But if all of the data are against us, then there is a huge conspiracy to defraud the public in order to gain government grants."
Of course, one must wonder how a Congress controlled by the Republican Party over many of the years in question found itself funding this conspiracy, and what the party and their fossil-fuel industry donors got out of doing so. But in any case, when the argument descends to the level of claiming an Illuminati-scale global conspiracy exists, I would call that a move of desperation.