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On This Day, June 21
- 2025: A hot air balloon catches fire mid-flight and crashes in Praia Grande, Santa Catarina, Brazil, killing 8 of the 21 on board.
- 2012: A boat carrying more than 200 migrants capsizes in the Indian Ocean between the Indonesian island of Java and Christmas Island, killing 17 people and leaving 70 others missing.
- 2012: An Indonesian Air Force Fokker F27 Friendship crashes near Halim Perdanakusuma International Airport, killing 11.
- 2009: Greenland assumes self-rule.
- 2006: Pluto's newly discovered moons are officially named Nix and Hydra.