“NASA's Pathfinder, Pathfinder Plus, Centurion and Helios Prototype were an evolutionary series of solar- and fuel-cell-system-powered unmanned aerial vehicles. AeroVironment, Inc. developed the vehicles under NASA's Environmental Research Aircraft and Sensor Technology (ERAST) program. They were built to develop the technologies that would allow long-term, high-altitude aircraft to serve as “atmospheric satellites”, to perform atmospheric research tasks as well as serve as communications platforms”. – Wikipedia

Photo: The solar-electric Helios Prototype flying wing is flies over the Hawaiian islands of Niihau and Lehua during the first solar-powered test flight July 14, 2001 from the U.S. Navy's Pacific Missile Range Facility on Kauai, HI. The 18-hour flight was a functional checkout of the aircraft's systems and performance in preparation for an attempt to reach sustained flight at 100,000 feet altitude later in the summer. (Photo Courtesy of NASA/Getty Images)

Figurines of former pro-Russian separatist commander Igor Strelkov from the collection entitled “Toy Soldiers of Novorossiya” are on display at a workshop in Moscow August 29, 2014. A Moscow-based maker of toy soldiers has sought inspiration for his creations from Ukrainian rebels fighting government troops in the east of Ukraine. Toy soldier maker, Timur Zamilov, displayed his new collection of rebel fighters cast in metal on Friday, before they are due to go on sale. His new collection is entitled “Toy Soldiers of Novorossiya” (New Russia), a reference to regions in eastern Ukraine where pro-Russian separatist fighters want full independence. Zamilov's selection includes models of Cossack soldiers, volunteers, soldiers bearing anti-aircraft missiles and even a miniature of prominent rebel leader Igor Strelkov. (Photo by Sergei Karpukhin/Reuters)

The Azerbaijan-based artist’s mixed-media installations include pieces entitled “Looking at two cities from one point of view”, “Plastik portret” and “Crisis haha”. Alakbarov carefully positions multicolored acrylic planes, packaging materials, and other objects of assorted shapes and then projects light upon then to create shadow images of beautiful beaches, cities, people, and even words.

A South Korean woman looks out at the flood water after a torrential rain storm hit the capital city on July 27, 2011 in Seoul, South Korea. South Korea issued a national crisis warning on as torrential rain caused flooding in parts of the country, killing over 35 with at least ten missing. (Photo by Chung Sung-Jun/Getty Images)

In this Monday, March 18, 2019 photo, a street artist performs in Caracas, Venezuela. Venezuelans are facing a severe economic and political crisis as President Nicolas Maduro has remained in power despite heavy pressure from the United States and other countries arrayed against him, managing to retain the loyalty of most of Venezuela's military leaders. (Photo by Natacha Pisarenko/AP Photo)

Venezuelan Hildemaro Ortiz relaxes inside of an abandoned bus in the border city of Pacaraima, Brazil on April 13, 2019. Ten destitute Venezuelan migrants who fled their country's crisis did not get far when they crossed into Brazil: they have been living for three months on an abandoned bus just across the border. (Photo by Pilar Olivares/Reuters)

A Salvadoran clown is seen wearing colorful clothes and face make-up during the parade within the framework of the National Salvadoran Clown Day that is celebrated on the first Wednesday of every December by legislative decree in San Salvador, El Salvador on December 07, 2022. After the pandemic crisis, dozens of Salvadoran clowns took to the streets to celebrate their day, and invite families to respect the work of bringing smiles to children and adults in El Salvador. (Photo by Alex Pena/Anadolu Agency via Getty Images)

A woman takes a picture of a goat in Llandudno as the spread of the coronavirus disease (COVID-19) continues, Llandudno, Wales, Britain, March 31, 2020. Like other countries affected by the global coronavirus crisis, the United Kingdom has imposed strict social distancing measures including shop and school closures, and the authorities are asking everyone to stay at home except for essential travel. (Photo by Carl Recine/Reuters)