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When doctors autopsied tuberculosis patients, they described finding round, white swellings, especially in and around the lungs. Medical historian Howard Markel describes how those potato-like growths led to the disease being called tuberculosis, from the Latin tuber.

As the U.S. wraps up its military presence in Iraq, officials are facing the huge logistical challenge of pulling out after nearly nine years. As bases are transferred to Iraqi control, it's cheaper to leave some equipment behind rather than ship it home.

The influential writer and cultural critic died Thursday at the age of 62 from complications of cancer of the esophagus. Hitchens confronted his disease in part by writing, bringing the same unsparing insight to his mortality that he had directed at so many other subjects.

Fuel convoys are expensive and dangerous, pushing the military to seek out new energy sources. That frequently pairs them with alternative energy startups, which some call risky ventures. For the companies themselves, the chance to work with the military means more investment and a chance to expand.

New Hampshire accounts for a tiny portion of the delegates Republicans are competing for — just 5 percent. But voters in the Granite State feel their votes serve as an important vetting process and spring board for candidates.

Some donors willing to write seven-figure checks to superPACs have gotten something they weren't counting on: attention from the political opposition and the media. One donor says he feels like he has a "target strapped on my back."

Bill reads three news-related limericks: Eau de Ad, Sweet Destruction and Milwaukee's Breast.

Bob Schieffer, anchor of CBS' Face the Nation, retires Sunday after 46 years at the network. NPR TV Critic Eric Deggans says Schieffer is the last among a vanished breed of traditional news anchors.

At this point, the better question might be who in the Republican field isn't going to run for president.

Organic farmers say they need crop varieties that were bred specifically for conditions on their farms. Clif Bar & Company decided to back their cause with up to $10 million in grants.