In this Wednesday, August 3, 2016 photo, research scientist Sung-Jin Park displays a tissue-engineered robot on a piece of glass in a laboratory at Harvard University, in Cambridge, Mass. The stingray-shaped robot, capable of paddling in water after exposure to blue light, has a gold skeleton, silicone fins and the heart muscle cells of a rat. (Photo by Steven Senne/AP Photo)





In this June 10, 2005 file photo, members of the Ethiopian army patrol the streets of Addis Ababa, Ethiopia, after recent clashes with protesters. Violent weekend clashes between protesters and security forces have claimed the lives of more than a dozen people across Ethiopia. The government announced Sunday, August 7, 2016 that seven protesters died in the northern Amhara region's capital, Bahir Dar. Witnesses who spoke to The Associated Press anonymously for fear of reprisals said anti-riot police also used force Saturday to disperse hundreds of protesters in the capital, Addis Ababa. (Photo by Karel Prinsloo/AP Photo)





In this handout picture taken Thursday August 4, 2016 British quadruple amputee mountaineer Jamie Andrew, right, and Steve James, who accompanied him, stand on Matterhorn Mountain in Switzerland. The British mountaineer who climbed Switzerland's iconic Matterhorn says he is the first quadruple amputee to do so. Jamie Andrew lost his hands and feet to frostbite after becoming trapped in a snowstorm while mountaineering in France 17 years ago. (Courtesy of Jamie Andrew via AP Photo)





A demonstrator raises her fist as she blocks Lake Shore Drive during a protest for the fatal police shooting of Paul O'Neal August 7, 2016 in Chicago, Illinois. O'Neal, an unarmed 18-year-old man was shot and fatally wounded July 28, when Chicago Police officers tried to arrest him for allegedly stealing a Jaguar car from the suburbs. The Chicago Police department released videos of the shooting to the public and media, which was captured by body cameras and dashboard cameras. (Photo by Joshua Lott/Getty Images)





The clown-duo Acrobuffos, consisting of the married American couple Christina Gelsone and Seth Bloom, part of the Southbank Centre's Festival of Love, in London, Monday, August 8, 2016. The show Air Play kicks off on Tuesday. Everything from umbrella juggling, silky airborne fabric and balloons in all sizes are featured in the performance. (Photo by Leonora Beck/AP Photo)





General Staff of Bolivia's Armed Forces General Gina Reque Teran (L) attends a parade as part of Bolivia's Independence Day celebrations, in Santa Cruz, August 7, 2016. (Photo by Freddy Zarco/Reuters/Courtesy of Bolivian Presidency)





Bolivia's navy officers participate during a parade as part of Bolivia's Independence Day celebrations, in Santa Cruz, August 7, 2016. (Photo by Freddy Zarco/Reuters/Courtesy of Bolivian Presidency)





Bolivia's indigenous women participate during a parade as part of Bolivia's Independence Day celebrations, in Santa Cruz, August 7, 2016. (Photo by Freddy Zarco/Reuters/Courtesy of Bolivian Presidency)





Myanmar religious leaders paint the floor in red representing blood during a ceremony to mark the anniversary of the 1988 democratic uprising, also known as “8888” in the country formerly known as Burma in Yangon, Myanmar August 8, 2016. (Photo by Soe Zeya Tun/Reuters)





A woman lays cutouts of number 8 during the ceremony marking the 28th anniversary of the 8888 uprising in Yangon, Myanmar, 08 August 2016. The 08 August 1988, also known as '8888 Uprising' marked the start of protests by students in Yangon that would soon spread through the country. The demonstrations were aimed at the then ruling Burma Socialist Programme Party regime of the one-party state, headed by General Ne Win. The protests ended in September the same year after a military coup by the State Law and Order Restoration Council (SLORC). (Photo by Lynn Bo Bo/EPA)





People watch a large screen showing Japanese Emperor Akihito's video address in Tokyo, Japan, August 8, 2016. (Photo by Kim Kyung-Hoon/Reuters)





People watch a large screen showing Japanese Emperor Akihito's video address in Tokyo, Japan, August 8, 2016. (Photo by Kim Kyung-Hoon/Reuters)





Government workers scoop out rubbish washed ashore due to strong waves brought about by the monsoon rains during a clean up operation along Manila bay, metro Manila, Philippines, August 8, 2016. (Photo by Romeo Ranoco/Reuters)





A gardener works at the government house garden in Bangkok, Thailand August 8, 2016. (Photo by Jorge Silva/Reuters)





Russian Paralympic torchbearer Aleksey Ashapatov attends a training session at Yunost sports ground in the Black Sea resort of Sochi, Russia, August 8, 2016. (Photo by Kazbek Basayev/Reuters)





Iranian servicemen pray during the Paratrooper's platoon competition for airborne squads, part of the International Army Games 2016, at the Rayevsky shooting range outside the Black Sea port of Novorossiysk, Russia, August 8, 2016. (Photo by Maxim Shemetov/Reuters)





Chinese servicemen sit atop an armoured infantry fighting vehicle during the Paratrooper's platoon competition for airborne squads, part of the International Army Games 2016, at the Rayevsky shooting range outside the Black Sea port of Novorossiysk, Russia, August 8, 2016. (Photo by Maxim Shemeto/Reuters)





People play the augmented reality mobile game “Pokemon Go” by Nintendo in Hong Kong, China August 6, 2016. (Photo by Tyrone Siu/Reuters)





People run as they play the augmented reality mobile game “Pokemon Go” by Nintendo in Hong Kong, China August 6, 2016. (Photo by Tyrone Siu/Reuters)





Surinamese Caribe and Arawak natives try to put out a fire to set the spirit free during the Epekodono (hair cutting) mourning ceremony, ahead of the celebrations of the UN's International Day of Indigenous People in the Palm Garden in Paramaribo, Suriname, August 8, 2016. (Photo by Ranu Abhelakh/Reuters)





Tobacco farmers welcome the harvest in central Java, Boyolali, Indonesia on August 8, 2016. The tobacco industry is one of the country’s largest industries, with high domestic consumption – it is estimated that about 65% of Indonesian men are smokers. (Photo by Solo Imaji/Barcroft Images)





Firefighters battle flames during a forest fire in A-dos-Ferreiros, Agueda, Aveiro, Portugal, 08 August 2016. Ninety seven seven fire vehicles and two airplanes are working to fight the fire. (Photo by Nuno Andre Ferreira/EPA)





A firefighter pulls a hose as he combats a wildfire in Bustelo, close to Barcelos, northern Portugal, on August 8, 2016. Portuguese meteorologists have advised that up to Wednesday nearly the entire north of the country was at a “very high to maximum” risk of forest fires. Forest fires, raging since Friday in northern Portugal, had redoubled in vigor late yesterday, mobilizing more than 3,000 men fighting against 160 fires, eight classified as “important”. (Photo by Miguel Riopa/AFP Photo)





A man takes a photograph of an ice sculpture at the Hongdae Ice Museum in Seoul, South Korea, Monday, August 8, 2016. South Korea has been experiencing sweltering heat the last few days. (Photo by Ahn Young-joon/AP Photo)





An attendant walks though the screen into the art installation “Curtain Call” by artist Ron Arad at The Roundhouse on August 8, 2016 in London, England. (Photo by Ian Gavan/Getty Images)





A Dani tribe man participates in a mock tribal war in Walesi district in Wamena, Papua Province on August 8, 2016. The performances at the 27th Baliem valley festival, featuring highland tribes of Dani, Yali and Lani in their mock battles as symbol of high spirit and power that have been practised for generations, is held in Wamena on August 8 – 10. (Photo by Adek Berry/AFP Photo)





Kashmiri Muslim protesters run for cover amid tear gas smoke as Indian paramilitary soldiers walk back towards their base camp after a day long curfew in Srinagar, Indian controlled Kashmir, Monday, August 8, 2016. Kashmir has been under a security lockdown and curfew since the killing of a popular rebel commander on July 8 sparked some of the largest protests against Indian rule in recent years. (Photo by Dar Yasin/AP Photo)





An Indian paramilitary soldier falls down as he tries to kick back an exploded tear gas shell thrown back at them by Kashmiri Muslim protesters at the end of a day long curfew in Srinagar, Indian controlled Kashmir, Monday, August 8, 2016. (Photo by Dar Yasin/AP Photo)





Members of a dance troupe perform during a parade of the Bolivian community living in Chile, in Santiago, Chile, 06 August 2016. Dozens of Bolivians participated in the parade with religious dances to pay tribute to the “Virgen Morena de Copacabana”, the patron saint of Bolivia. (Photo by Esteban Garay/EPA)





A Pakistani man mourns the death of a family member who was killed in a bomb blast, in Quetta, Pakistan, Monday, August 8, 2016. A powerful bomb went off inside a government-run hospital in the southwestern city of Quetta on Monday, killing dozens of people and wounding dozens of others, police said. (Photo by Arshad Butt/AP Photo)





People help victims of a bomb blast in Quetta, Pakistan, Monday, August 8, 2016. A powerful bomb went off on the grounds of a government-run hospital Monday, killing dozens of people, police said. (Photo by Arshad Butt/AP Photo)





Pakistani lawyers mourn the deaths of their colleagues following a bomb blast in Quetta, Pakistan, Monday, August 8, 2016. (Photo by Arshad Butt/AP Photo)





A damaged vehicle is seen next to the ring road, around Skopje, near the village of Stajkovci, Skopje, The Former Yugoslav Republic of Macedonia, 08 August 2016. At least 21 people have died and more than 100 are injured in the heavy rain storm that hit the Macedonian capital Skopje late Saturday night causing severe damage to the roads and house infrastructure. More than 80 vehicles were hit by landslides at Skopje's ring road. The highway remains closed. The government announced a 15-day state of emergency in the Skopje and Tetovo region. (Photo by Georgi Licovski/EPA)





A man takes a photo of damaged vehicles following floods in the village of Stajkovci, near Skopje, on August 7, 2016. Fierce storms packing strong winds and torrential rains overnight killed at least 20 people in Macedonia's capital of Skopje, the health minister said August 7. The freak weather included winds blowing at more than 70 kilometres (43 miles) an hour and resulted in flash floods and landslides, with cars swept away by the violent torrents. (Photo by Robert Atanasovski/AFP Photo)





A Japanese performs as god Ebisu during a Kagura trance dance performance by local teenagers in Gotsu city, Shimane prefecture, 07 August 2016. The Iwami Kagura, found in Shimane prefecture, is considered one of the three major forms of Kagura trance dance in Japan. The dance originated in ancient Japanese mythology and was performed to entertain the Japanese Shinto gods of nature. (Photo by Everett Kennedy Brown/EPA)





A rebel fighter reloads the magazine of his weapon during clasahes with regime forces in Ramussa on the southwestern edges of Syria's northern city of Aleppo on August 6, 2016. Syrian rebels said they have broken a three-week government siege of second city Aleppo, turning the tables on Russian-backed regime forces who are now on the defensive. (Photo by Fadi Al-Halabi/AFP Photo)





Kesha is the first entertainer to perform in concert at Harrah's Waterfront on August 6, 2016 in Atlantic City, New Jersey. (Photo by Donald Kravitz/Getty Images)





Over 11 huge parade balloons show on Chongqing Heishangu International Huge Balloon Festival in Chongqing, China on August 6, 2016. (Photo by Ran Wen/ZUMA Press/Splash News)