North Charleston police officer Michael Slager (R) is seen allegedly shooting 50-year-old Walter Scott in the back as he runs away, in this still image from video in North Charleston, South Carolina, USA. April 4, 2015.

Photo Handout

U.S. President Barack Obama (2nd R) is greeted by Jamaica’s Prime Minister Portia Simpson Miller (C) as he arrives aboard Air Force One at Norman Manley International Airport in Kingston, Jamaica. April 8, 2015.

Photo by Jonathan Ernst

Morgue workers drive bodies of suspected Garissa University College attackers at a school compound in Garissa, Kenya. April 4, 2015.

Photo by Noor Khamis

Teresa Apiyo carries a portrat of her cousin Selpha Wanda, a student killed during an attack by gunmen at the Garissa University, from the Chiromo Mortuary in the capital Nairobi, Kenya. April 9, 2015.

Photo by Thomas Mukoya

A boy holds a blood-stained garment at the site of an air strike on a house, in Bait Rejal village west of Yemen’s capital Sanaa. April 7, 2015.

Photo by Khaled Abdullah Ali Al Mahdi

A woman supporting Yemen’s former President Ali Abdullah Saleh, wears a pin with an image of Saleh’s son Ahmed Ali Abdullah Saleh (C), during a rally against airstrikes, in Sanaa, Yemen. April 3, 2015.

Photo by Mohamed Al-Sayaghi

Relatives of slain state police officers react during a homage in Tlaquepaque, on the outskirts of Guadalajara, Mexico. April 8, 2015.

Photo by STRINGER Mexico

People meditate on the helipad of Copan building to celebrate World Health Day, which was observed on April 7, in downtown Sao Paulo, Brazil. April 9, 2015.

Photo by Nacho Doce

Boys play soccer on a driftwood soccer court, on the banks of the Rio Negro or Black River in Catalao community near Manaus, in Amazonas state, Brazil. April 4, 2015.

Photo by Bruno Kelly

Louisville Metro Police block Highway 22 after the road collapsed in Louisville, Kentucky, USA. April 3, 2015.

Photo by John Sommers II

A view of central Sanaa covered in dust, Yemen. April 3, 2015.

Photo by Mohamed Al-Sayaghi

A construction worker holds a turtle for sale on a street near a construction site in Beijing, China. April 7, 2015.

Photo by Kim Kyung Hoon

A racehorse begins to lose consciousness following an anaesthetic at Veliefendi equine hospital in Istanbul, Turkey. April 6, 2015.

Photo by Murad Sezer

A replica of pre-historic drawings showing lions is seen on a wall during a press visit at the site of the Cavern of Pont-d’Arc project in Vallon Pont d’Arc, France. April 8, 2015.

Photo by Robert Pratta