Lupe Dempsey, a retired federal agent, brings her Glock 9mm with her when she goes down to the Rio Grande. She believes the border is too wide open, evidenced by this unguarded metal walkway across the river in far West Texas.
John Burnett/NPR
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The Old World hookworm is an intestinal parasite. The image above was taken by a scanning electron micrograph and was color-enhanced. The worm's actual size ranges from 0.03 inches to 0.3 inches.
David Scharf/Science Source
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Maoulida Daroueche of the Comoros will compete Monday in the 400-meter hurdles. Daroueche, 25, had a tough life as a kid in the Comoros, but now resides in France and is competing in his second Olympics.
Melissa Block/NPR
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