​FILE - MARCH 20, 2026: According to reports, former FBI Director Robert Mueller has died at age 81. WASHINGTON - JUNE 04: FBI Director Robert Mueller testifies during a hearing before the Commerce, Justice, Science and Related Agencies Subcommittee of the Senate Appropriations Committee on Capitol Hill June 4, 2009 in Washington, DC. The hearing was to examine the FY2010 budget request for the FBI. (Photo by Alex Wong/Getty Images)

AFP presents a reportage of 29 images showing divers learning how to dive in polar regions so they could carry out scientific research on the climate change, on March 14, 2026. Search all these reportage images using FINLAND-CLIMATE-ENVIRONMENT-DIVING-POLAR-SCIENCE Search "REPORTAGE" to source all feature, magazine and photo essays (Photo by -STR / AFP via Getty Images)

The sun shines through the clouds over the frozen lake at the Kilpisjaervi Biological Station in Finland, on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program prepares an ice hole, or maina, prior to a diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program is lifted out of the water by colleagues after a 45-minute-long diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program has her goggles adjusted by a colleague before a 45-minute-long diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program is lifted out of the water by colleagues after a 45-minute-long diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)

A participant in the Polar Scientific Diving program enters the water for a 45-minute-long diving session, at the Kilpisjaervi Biological Station in Finland on March 14, 2026. In northernmost Finland, divers learn to conduct research below ice in harsh Arctic conditions to understand how climate change is transforming the world's polar regions. (Photo by John MACDOUGALL / AFP via Getty Images)