In early May, The Guardian, on its website, published a photo essay that captured the newfound popularity of drive-in theatres. It had some lovely images: a family of four in Utah huddled together in their car, waiting for the screen to light up; the audience arriving for an open-air movie screening in Tehran for the first time since 1979; and a group enjoying a film while being seated on the edge of an airport runway, with planes taxiing in the backdrop, in Lithuania. The pictures cut across geographies, an ode to a concept that many felt had failed the test