Can you give an example of a documentary where the person telling the story believed it to be true, but it turned out to be false?

Read also:

• “Mars in 2026 is 50/50”: Elon Musk Unveils Plan for SpaceX's Biggest Starship Yet Launching by Year's End, Raising Global Curiosity - Rude Baguette
• If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?
• Why do so many autistic adults deal with self-hatred?
• Are there really people who still believe the Earth is flat?
• Why does my sister want to have sex with me? What should I do?
• What do you think about a sister's love?
• A high-resolution spectrometer that fits into smartphones - Phys.org
• Why did Kakashi use Chidori against Rin, despite knowing about her feelings for Obito?
• Jenny from Perth writes – my partner is the life of the party, women and men adore him. But at home, he gets angry at us for the silliest reasons and never nice words me or our kids, always putting us down. Should I stay or leave him?
• Kate Middleton and Princess Charlotte Opt for Aquamarine for Trooping the Colour 2025 - Vogue
• 'RuPaul's Drag Race' queen Ginger Minj reveals autism diagnosis after 'All Stars 10' psych exam - Entertainment Weekly
• Why do people who aren't trans feel the need to put pronouns next to their name or picture? It seems so cringeworthy to me, to participate in that SJW paradigm of thought, like they are a spineless person who just goes along with the trends.