Lawyer Monique Pressley accompanied Bill Cosby and lawyer Brian McMonagle at a criminal court appearance in Elkins Park, Pa., last month. Matt Rourke/AP hide caption

A memorial is seen on West Baltimore street at the site of the city's 300th homicide on Nov. 19, 2015. Jun Tsuboike/NPR hide caption

Republican presidential candidate Donald Trump speaking at Thursday's campaign event in Burlington, Vt. Angela Evancie/Vermont Public Radio hide caption

Harold Pollack's index card of finance tips. Harold Pollack hide caption

Olivia Block's recent compositions are a mix of music and found voices — often taken from used microcassette tapes, artifacts from the answering-machine era. Michael Schmelling/Courtesy of the artist hide caption

Chicago Mayor Rahm Emanuel responds to a question during a news conference last month about new police procedures. Charles Rex Arbogast/AP hide caption

"By the middle of the next decade, the cars and trucks we buy will go twice as far on a gallon of gas," Obama promised in 2013. "That means you'll have to fill up half as often; we'll all reduce carbon pollution." Nati Harnik/AP hide caption

Mary Reed and her daughter, Emma McMahon, at the Safeway where Mary was shot along with 18 others on Jan. 8, 2011. Courtesy of StoryCorps hide caption

The stomach of Oetzi, who was mummified in ice, was home to bacteria that scientists were able to identify. The same species lives in the gut of many modern humans. EURAC/Marion Lafogler hide caption

Andy Raymond demonstrates the Armatix iP1, a .22-caliber smart gun that has a safety interlock, at Engage Armaments in Rockville, Md., last year. Katherine Frey/The Washington Post/Getty Images hide caption