NEW YORK — CNN fired conservative commentator Jeffrey Lord on Thursday after he tweeted a Nazi salute at a critic. A network spokesperson confirmed that Lord was no longer with the network and said "Nazi salutes are indefensible." The statement came hours after Lord tweeted the Nazi slogan "Sieg Heil!" at the head of a liberal advocacy group, Media Matters for America. Lord said in a telephone interview Thursday night that he respected CNN and its journalists, but fundamentally disagreed with the network's decision to fire him.