Top Gallery: Day in photos

This NASA handout image released July 29, 2015 shows Africa front and center in this image of Earth taken by a NASA camera on the Deep Space Climate Observatory (DSCOVR) satellite. The image, taken July 6 from a vantage point one million miles from Earth, was one of the first taken by NASAs Earth Polychromatic Imaging Camera (EPIC). Central Europe is toward the top of the image with the Sahara Desert to the south, showing the Nile River flowing to the Mediterranean Sea through Egypt.  AFP PHOTO / NASA / HANDOUT          == RESTRICTED TO EDITORIAL USE / MANDATORY CREDIT: 'AFP PHOTO / HANDOUT / NASA '/ NO MARKETING / NO ADVERTISING CAMPAIGNS / NO A LA CARTE SALES / DISTRIBUTED AS A SERVICE TO CLIENTS ==--/AFP/Getty Images

(-- / AFP/Getty Images)

Editor's choice

PH/STAFF Washington Post Studio DATE: 4/15/04 PHOTO: Julia Ewan/TWP CAPTION: Michel du Cille, The Washington Post. Assistant Managing Editor/Photography... manORG XMIT: DIGITAL

The career of Washington Post photojournalist Michel du Cille

Michel du Cille died at 58 doing the work he loved. He was completely devoted to the story of Ebola, and he was determined to stay on the story despite its risks.

Antonio Corento Espina, 50, is a cattle breeder who has been attending The Saca de la Yeguas for seven years. He swats harmlessly at the mares with a long stick to divide them into different groups according to their owners. (David Rengel)

Wild horses: In Spain, the American mustangs’ ancestral cousins live on

An annual marching of the mares helps to preserve their social legacy is one of the contributions of Andalusian culture to America.

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(Astrid Riecken / For The Washington Post)

Moving forward after a catastrophic injury

Josh Basile, a quadriplegic, is devoted to helping others who experience sudden spinal cord injuries.

(Courtesy of The McCarthy Family)

Family tragedies reflect the rise in heroin use

In Maine, deaths from heroin overdoses ballooned from seven in 2010 to 57 last year.

(Tiksa Negeri / Reuters)

What Obama is doing on his final presidential trip to Africa

The trip marks the first time a sitting president has visited Ethi­o­pia. Obama last traveled to Kenya when he was a U.S. senator in 2006.

(Brittany Greeson / The Washington Post)

Good, clean fun at Maryland mud run

The event urged more than 3,000 participants to raise awareness of domestic violence through a five-mile, 10-obstacle course characterized by grime and grit.

(Gir National Park And Sanctuary / AFP/Getty Images)

Animal views

Fun and fascinating animals around the world.

(Rich Lipski)

Iconic Washington Post images: Buy reader favorites

Go to www.washingtonpostreprints.com and click on “Purchase a Photo for Personal Use.”