Third-year medical student Allie Tetreault, left, talks with Gabrielle Nuki, 16, at Maine Medical Center in Portland, Maine. Gabrielle helps med students practice patient care. Patti Wight/MPBN hide caption

itoggle caption Patti Wight/MPBN

Long time employees Denise Miller, facing camera, and Gloria Panameno hug as they leave the Showboat Casino Hotel on Sunday. Owner Caesars Entertainment closed the still-profitable Showboat to reduce the number of casinos in Atlantic City, which has been struggling with plunging revenue. Mel Evans/AP hide caption

itoggle caption Mel Evans/AP

Jason Wright, seen here during his 15-month deployment to Iraq, served in the military for nine years before resigning last week. Courtesy of Jason Wright hide caption

itoggle caption Courtesy of Jason Wright

A glimpse of what it's like in the sinkhole that opened up Wednesday under a wing of the National Corvette Museum in Bowling Green, Ky. National Corvette Museum hide caption

itoggle caption National Corvette Museum

This hangout spot in East Baltimore — like the rest of the city's outdoor spaces — now comes with a police-enforced nighttime age limit. Children under 14 must be indoors by 9 p.m. each night, all year long. Kids age 14-16 can stay out a little later, until 10 p.m. on school nights and 11 p.m. on other nights. Courtesy of Brian O'Doherty hide caption

itoggle caption Courtesy of Brian O'Doherty

Barbara Bush helps a nun to fit on a hearing device during a 2012 event in Gulu, Uganda. She says was interested in architecture as a college student but became a global health activist after visiting East Africa with her parents. Reuters/Landov hide caption

itoggle caption Reuters/Landov

Across Washington State, hydroelectric dams are blocking salmon as they migrate to their spawning grounds. Enter the salmon cannon. Ingrid Taylar/Flickr hide caption

itoggle caption Ingrid Taylar/Flickr

Discovery Channel identifies the shark in this promotional image as the "Shark of Darkness." And in the "documentary" by that name, supposed scientists describe how this monster "submarine" shark is over 30 feet long. But submarine sharks aren't real, and the documentary is fake — an important fact critics say is easy to miss. Chris Fallows/Discovery Channel hide caption

itoggle caption Chris Fallows/Discovery Channel