Aiden Haas, left, and Lilli Alcala pose after being crowned Mud King and Mud Queen at the 29th annual Mud Day, Tuesday, July 12, 2016 in Westland, Mich. The event, open to children 12 and younger, was at the Hines Park-Nankin Mills Area west of Detroit. Children 12 and younger were able to slosh around in the pit while participating in mud limbo, wheelbarrow races and other free activities. (Photo by Carlos Osorio/AP Photo)
A Mongolian man controls his horse during the Mongolian summer festival known as Naadam on the outskirts of Ulan Bator on July 13, 2016. (Photo by Wang Zhao/AFP Photo)
U.S. President Barack Obama and first lady Michelle Obama step from Air Force One as they return to Joint Base Andrews in Washington after attending memorial service for fallen police officers in Dallas, Texas, July 12, 2016. (Photo by Kevin Lamarque/Reuters)
A reveler waits on the barrier of the Estafeta corner the star of the seventh running of the bull with Nunez del Cubillo's fighting bulls, at the San Fermin Festival, in Pamplona, northern Spain, Wednesday, July 13, 2016. Revelers from around the world flock to Pamplona every year to take part in the eight days of the running of the bulls. (Photo by Alvaro Barrientos/AP Photo)
Amnesty International activists take part in a performance to protest against enforced disappearance in downtown Rome, Italy July 13, 2016. A report from Amnesty International has turned the focus on alleged kidnapping and torture in Egypt of hundreds of students, political activists, protesters and even young teenagers during the past three years. A demonstration in Rome organised by the charity sought to highlight how people vanished without trace after security forces raided their homes. Most of them, it is claimed are supporters of former Muslim Brotherhood president Mohamed Morsi. (Photo by Tony Gentile/Reuters)
A man sits in the scoop of an Israeli excavator as tries to prevent it from clearing his land during a protest against Jewish settlements, near the village of Deir Qaddis near the West Bank city of Ramallah July 13, 2016. (Photo by Mohamad Torokman/Reuters)
Preshoolers hide under their desk during an earthquake drill at a kindergarten in Seoul, South Korea, 13 July 2016. Last week, a magnitude 5.0 earthquake occurred near South Korea's southeastern city of Ulsan, but it caused no fatalities or serious damage. (Photo by EPA/Yonhap)
A female soldier takes aim as Israeli male and female combat soldiers of the Bardales battalion take part in a long day of practise in a heavy fog on July 13, 2016 in Nitzana, Israel. Bardales battalion is a new mixed-gender combat battalion that has been active since 2015. (Photo by Ilia Yefimovich/Getty Images)
South Africans gather in support of the #BlackLivesMatter movement outside the US embassy in Cape Town, South Africa, 13 July 2016. The protest organised by the Black Solidarity Movement handed over a memorandum to a representative of the US embassy saying US citizens are not welcome in South Africa and warned the US against killing black people in America and elsewhere. The protestors were initially prevented from nearing the embassy but later allowed access to the entrance of the embassy where they met a representative under a heavy police presence. (Photo by Nic Bothma/EPA)