A worker in Claysville, Pa., shovels the fine powder that's part of a watery mixture used in hydraulic fracturing. Silica dust is created in a wide variety of construction and manufacturing industries, too.
Keith Srakocic/AP
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Long known as a workplace hazard, silica dust can cause irreversible lung scarring and cancer. The Department of Labor expects its new limit to save about 600 lives a year. But industry is balking.
Manaf Ibrahim takes a break from making sandwiches in a small town close to an airstrip he believes the U.S. is using to supply its advisers on the ground in eastern Syria.
Alice Fordham /NPR
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The Benicia Compliments page sprang up on Instagram as a platform for girls attending Benicia High School to tag each other in positive social media posts.
Shawn Wen/Youth Radio
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Former CIA Director Michael Hayden says European countries face a growing terrorist threat but have a poor record of sharing intelligence among themselves. He's shown here at a 2009 news conference at CIA headquarters.
Luis Alvarez/AP
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A polling station in Oakmont, Pa., on Nov. 6, 2012. Winning a presidential nomination includes mastering complex rules about delegates, and Pennsylvania's rules are among the most complicated.
Jeff Swensen/Getty Images
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A worker in Claysville, Pa., shovels the fine powder that's part of a watery mixture used in hydraulic fracturing. Silica dust is created in a wide variety of construction and manufacturing industries, too.
Keith Srakocic/AP
hide caption
