The New York Times's David Herszenhorn on Friday wrote up a bizarre new conference held by the parents of the Boston Marathon bombers in the Russian Republic of Dagestan, where they have lived for the past year: "Parents Deny Son's Guilt And Accuse U.S. of Plot."

It's puzzling why Herszenhorn chose such a credulous tone to the conspiratorial rants of the bombers' mother Zubeidat Tsarnaeva (The Washington Post made do with a brief mention at the very end of a related story on Friday).