About a quarter of the chicken parts we buy are tainted with salmonella, according to USDA tests. snowpea&bokchoi/Flickr hide caption

A Los Angeles County Department of Public Health worker shows condoms for weekly distribution to inmates in the Men's Central Jail. George Lavender hide caption

Adam Eidinger, chairman of the D.C. Cannabis Campaign, puts up Initiative 71 posters in October. The measure to legalize possession of up to 2 ounces of marijuana was approved by a wide margin of local voters. Jacquelyn Martin/AP hide caption

A miner holds a nugget of mercury mixed with gold. The mercury is used to extract gold from river sludge. Rodrigo Abd/AP hide caption

Written during the Soviet era, Mikhail Bulgakov's classic novel, The Master and Margarita, continues to resonate in today's Russia. Sovfoto/UIG via Getty Images hide caption

Scientists reprogrammed the common bacterium E. coli so it requires a synthetic amino acid to live. BSIP/UIG via Getty Images hide caption

President Obama called on the Federal Communications Commission to implement a strict policy of net neutrality and to oppose content providers in restricting bandwidth to customers. Michael Bocchieri/Getty Images hide caption

Former air marshal Robert MacLean blew the whistle after he was informed that missions on overnight, long-distance flights were being canceled. The announcement came just days after air marshals were warned of terrorist threats. LM Otero/AP hide caption