From left, clockwise: Hong Kong protests turn to widespread riots and civil disobedience; Fire destroys spire and roof of Notre Dame de Paris; Memorial tributes to victims of the Christchurch mosque shootings; Protesters in Baghdad during October Revolution; Chilean protests; Failed coup against Maduro in Venezuela; House of Representatives votes to adopt articles of impeachment against Donald Trump; First image of a black hole (M87*) captured by the Event Horizon Telescope; CRISPR gene editing first used to experimentally treat a patient with a genetic disorder; the Chilean protests; the Event Horizon Telescope captures the first image of a black hole; Protesters in Tahrir Square during the 2019–2021 Iraqi protests; Fire destroys the spire and roof of Notre Dame de Paris; a protest march against Maduro in Caracas called by Juan Guaido, Interim President of Venezuela