National Guardsmen are put through riot training in Boston's Commonwealth Armory on Friday, October 18, 1974. Massachusetts Gov. Francis W. Sargent called up the guard to quell school violence, but the city has been relatively calm and the guard has remained in the armories. (Photo by JWG/AP Photo)

Everly Base, six, sees the funny side of a TV carol-singing performance with her classmates in which her father had dared her to cross her eyes while she sang in Yate, Gloucestershire, UK on December 19, 2024. (Photo by Tom Wren/South West News Service)

The drag artist Wet Mess performs Testo – a show about testosterone – at the Here & Now Showcase, Edinburgh international festival fringe in 2024. (Photo by Murdo MacLeod/The Guardian)

The Rio Tinto river in Spain crosses an ancient mining site which makes the water turn a variety of bright colours. Copper, silver and gold are mined here, as well as iron, which turns the water red. An ochre mix is responsible for the yellow tint of the rest of the river. (Photo by Olivier Jarry-Lancombe/Solent News)

Members of the London Fire Spinners group meet once a month, pictured at Gabriel's Wharf along the River Thames, UK. A collective of glow and fire performers with extensive performance experience. Dated on March 14, 2025. (Photo by Kevin Jay/Picture Exclusive)

Eurocopter's X³ high-speed hybrid helicopter demonstrator performs, September 6, 2010. The Eurocopter X³ (X-Cubed) is an experimental high-speed compound helicopter developed by Eurocopter (now Airbus Helicopters). A technology demonstration platform for Eurocopter “high-speed, long-range hybrid helicopter” or H³ concept, the X³ achieved 255 knots in level flight on 7 June 2013, setting an unofficial speed record for a helicopter. (Photo by Reuters/HO/Eurocopter/Penna)

U.S. Marines kick in a door while securing a building next to the main hospital in central Baghdad April 15, 2003, which will be used as a temporary Iraqi police headquarters. (Photo by Jerry Lampen/Reuters)