When Dr. Newdow described "under God" as a divisive addition to the pledge, Chief Justice William H. Rehnquist asked him what the vote in Congress had been 50 years ago when the phrase was inserted.

The vote was unanimous, Dr. Newdow said.

"Well, that doesn't sound divisive," the chief justice observed.

Dr. Newdow shot back, "That's only because no atheist can get elected to public office."

The courtroom audience broke into applause, an exceedingly rare event that left the chief justice temporarily nonplussed. He appeared to collect himself for a moment, and then sternly warned the audience that the courtroom would be cleared "if there's any more clapping."