Which 2004 documentary by Michael Moore won the Palme d'Or at the Cannes Film Festival?

The 2004 documentary by Michael Moore that won the Palme d’Or at Cannes was Fahrenheit 9/11.

Moore wrote, directed, narrated, and appeared in the film, which focuses on George W. Bush’s presidency, the September 11 attacks, the Iraq War, and the American media’s treatment of those events. It is an openly political documentary rather than a neutral historical survey, and its arguments about the Bush administration generated intense debate over interpretation and accuracy.

Fahrenheit 9/11 debuted in competition at the 2004 Cannes Film Festival. On May 22, 2004, an international jury led by Quentin Tarantino awarded it the Palme d’Or, Cannes’s highest prize. It was only the second documentary to win the award after Jacques-Yves Cousteau and Louis Malle’s The Silent World in 1956.

The title alludes to Ray Bradbury’s Fahrenheit 451, adapting the number to September 11. Do not confuse it with Moore’s earlier Bowling for Columbine, which won the Academy Award for Best Documentary Feature but not Cannes’s top prize.