A robot from AgiBot is seen during the Global Developer Conference, organized by the Shanghai AI Industry Association, in Shanghai on February 21, 2025. (Hector Retamal via Getty Images)
From a balcony in the Ministry of Health Building in London, Prime Minister Winston Churchill addresses a huge crowd on May 8. 1945 (Victory in Europe Day). (Getty Images)
The Air Force Research Laboratory’s XQ-67A Off Board Sensing Station, or OBSS, takes its maiden flight on February 28, 2024, from Gray Butte Field Airport in Palmdale, California. (DVIDS)
Wild peach and apricot flowers are in full bloom in Yanqing District, encircling the Longquanyu Great Wall on March 25, 2025, in Beijing. (Hao Jihong via Getty Images)
A gas well drill is seen at Campo Maripe, a field claimed by the Mapuche indigenous community, in Anelo, Argentina, on November 27, 2019. (Getty Images)
Russian President Vladimir Putin and Chinese President Xi Jinping attend a festive reception for foreign leaders attending celebrations of Victory Day on May 9, 2025. (Getty Images)
A Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) poster displaying North Korean nuclear tests on February 12, 2013, at the CTBTO headquarters in Vienna, Austria. (Dieter Nagl/AFP via Getty Images)
Sailors assigned to Assault Craft Unit 4 prepare material recovered in the Atlantic Ocean from a high-altitude balloon for transport to federal agents at Joint Expeditionary Base Little Creek on February 10, 2023. (US Navy photo by Ryan Seelbach)
Sailors assigned to Assault Craft Unit Four operate landing craft air cushions during recovery efforts of a high-altitude balloon in the Atlantic Ocean, on February 8, 2023. (US Navy Photo by Ryan Seelbach)
A sailor assigned to Explosive Ordnance Disposal Group 2 conducts a search for debris with an underwater vehicle during recovery efforts of a high-altitude balloon in the Atlantic Ocean on February 7, 2023. (US Navy Photo by Ryan Seelbach)