This photo provided on Thursday, July 25, 2019, by the Planetary Society shows a portion of the LightSail2 spacecraft, top, and part of Earth, centered on Baja California, Mexico. It was one of the photos transmitted from The Planetary Society's LightSail 2 spacecraft, confirming the successful deployment of its solar sail. (Photo by Planetary Society via AP Photo)





Demonstrators wear post-it notes as part of the “Lennon Wall” movement during a protest against the recent violence in Yuen Long, at Hong Kong airport, China on July 26, 2019. More protests are expected on Saturday with demonstrators outraged at an attack on July 21 at a train station by armed men who police sources say included some with backgrounds in Hong Kong's triad criminal gangs. Some 45 people were wounded. (Photo by Edgar Su/Reuters)





A demonstrator holds a banner during a protest against the recent violence in Yuen Long, at Hong Kong airport, China on July 26, 2019. (Photo by Edgar Su/Reuters)





An information counter is seen covered with post-it notes as part of the “Lennon Wall” movement during a protest against the recent violence in Yuen Long, at Hong Kong airport, China on July 26, 2019. At the airport protesters, many dressed in black and seated on the ground, gradually filled the entire arrivals hall. They held up signs calling on the government to withdraw the extradition bill completely, while chants of “Free Hong Kong” reverberated around the cavernous glass and steel hall. (Photo by Edgar Su/Reuters)





Demonstrators participate in a march the day after the governor of Puerto Rico, Ricardo Rossello resigned from his charge in San Juan, on July 25, 2019. Puerto Rico's embattled governor announced his resignation late July 24, following two weeks of massive protests triggered by the release of a text exchange in which he and others mocked gay people, women and hurricane victims. “I announce that I will be resigning from the governor's post effective Friday, August 2 at 5 pm”, Rossello said, in a video statement posted on the government's Facebook page. (Photo by Ricardo Arduengo/AFP Photo)





British Prime Minister Boris Johnson visits North Road, Harbourne on July 26, 2019 in Birmingham, England. (Photo by Geoff Pugh – WPA Pool/Getty Images)





Rep. Ilhan Omar (D-MN) attends a press event on the first 200 days of the 116th Congress at the U.S. Capitol in Washington, U.S., July 25, 2019. (Photo by Mary F. Calvert/Reuters)





U.S. President Donald Trump says goodbye to his daughter, White House senior advisor Ivanka Trump, after participating in the “Pledge to America's Workers – One year Celebration” event in the State Dining Room of the White House in Washington, U.S., July 25, 2019. (Photo by Leah Millis/Reuters)





A woman cools off under a public water spray on the bank of the Seine river in Paris on July 25, 2019 as a new heatwave hits Europe. After all-time temperature records were smashed in Belgium, Germany and the Netherlands on July 24, Britain and the French capital Paris could on July 25 to see their highest ever temperatures (Photo by Philippe Lopez/AFP Photo)





Chinese destroyer Xian is moored at the Neva River embankment in St.Petersburg, Russia, Friday, July 26, 2019, with a sculpture of admiral and explorer Ivan Krusenshtern on the left. The destroyer will take part in Russian Navy Day Parade in Kronshtadt, outside St. Petersburg on Sunday, July 28. (Photo by Dmitri Lovetsky/AP Photo)





Military planes fly above a statue of Soviet Union founder Vladimir Lenin during a Naval parade rehearsal in St. Petersburg, Russia, Thursday, July 25, 2019. The celebration of Navy Day in Russia is traditionally marked on the last Sunday of July and will be celebrated on July 28 this year. (Photo by Dmitri Lovetsky/AP Photo)





An elderly woman covers her head from the sun as she begs for money in central Kiev, Ukraine on July 26, 2019. (Photo by Gleb Garanich/Reuters)





A couple covered in mud wait for it to dry at the Salt-works lakes near the Black Sea town of Burgas in Bulgaria on July 25, 2019. Thousands of tourists visit the red salt lakes for mud baths, which are believed to help the healing of muscular disorders and rheumatism. (Photo by Nikolay Doychinov/AFP Photo)





Aerial and contemporary circus performer Bev Grant from the Edinburgh Festival fringe show “Heroes” performs a preview of her show on July 26, 2019, which is running at the festival from 1st–26th August at the Udderbelly in George Square, Edinburgh, Scotland. (Photo by Andrew Milligan/PA Wire Press Association)





Filipinos wearing traditional costumes made from dried water hyacinth stalks, performs during the Water Lily Festival in Las Pinas city, Philippines, 26 July 2019. The Water Lily festival aims to promote the water hyacinth-based livelihood enterprises for residents in flood prone communities of Las Pinas city, according to Senator Cynthia Villar. (Photo by Rouelle Umali/Xinhua News Agency/Barcroft Media)





Tibetan people gather to celebrate the opening ceremony of the annual Qinghai Yushu Horse Racing Festival in the Yushu Tibetan Autonomous Prefecture, China on July 25, 2019. The Qinghai Yushu Horse Racing Festival is a traditional festival that was held during the week of July 25 – August 1 every year. (Photo by Imaginechina/Rex Features/Shutterstock)





Dancers scare a woman and her child during the Cubulco Fair in Baja Verapaz, Guatemala, 25 July 2019. The indigenous municipality of Cubulco holds its fair annually to celebrate Saint James the Great. (Photo by Esteban Biba/EPA/EFE/Rex Features/Shutterstock)





Dancers with masks participate in the “Tastuanes” (an indigenous pre-Columbian word for “leaders”), a Catholic feast in veneration of Santo Santiago (Saint James the Apostle), in Tonala, Jalisco State, Mexico, on July 25, 2019. (Photo by Ulises Ruiz/AFP Photo)