Mark Mardell, the BBC's North American editor, issued a mea culpa of sorts today after Jonathan Karl at ABC News dropped his bombshell that proves beyond any doubt that the Obama Administration lied about its involvement in editing the CIA's talking points surrounding the September 11 attack on our consulate in Libya. In a piece titled, "After Benghazi revelations, heads will roll," Mardell writes, "In the interests of full disclosure I have to say I have not in the past been persuaded that allegations of a cover-up were a big deal." He adds, "It seemed to me a partisan attack...