Sun reported that the Stones were getting ready to record their first album of original material in more than a decade, but it had not been released and was further delayed due to the COVID-19 pandemic. On Air, a collection of 18 recordings the band performed on the BBC between 1963 and 1965, was released in December 2017. The album featured eight songs the band had never recorded or released commercially. In May 2017, the No Filter Tour was announced, with fourteen shows in twelve different venues across Europe in September and October of the same year. It was later extended to go from May to July 2018, adding fourteen new dates across the UK and Europe, making it the band's first UK tour since 2006. In November 2018, the Stones announced plans to bring the No Filter Tour to US stadiums in 2019, with 13 shows set to run from April to June. In March 2019, it was announced that Jagger would be undergoing heart valve replacement surgery, forcing the band to postpone the 17-date North American leg of their No Filter Tour. On 4 April 2019, it was announced that Jagger had completed his heart valve procedure in New York, was recovering (in hospital) after a successful operation, and could be released in the following few days. On 16 May, the Rolling Stones announced that the No Filter Tour would resume on 21 June with the 17 postponed dates rescheduled up to the end of August. In March 2020, the No Filter Tour was postponed due to the COVID-19 pandemic. The Rolling Stones—featuring Jagger, Richards, Watts, and Wood at their homes—were one of the headline acts on Global Citizen's One World: Together at Home on-line and on-screen concert on 18 April 2020, a global event featuring dozens of artists and comedians to support frontline healthcare workers and the World Health Organization during the COVID-19 pandemic. On 23 April, Jagger announced through his Facebook page the release (the same day at 5pm BST) of the single "Living in a Ghost Town", a new Rolling Stones song recorded in London and Los Angeles in 2019 and finished in isolation (part of the new material that the band were recording in the studio before the COVID-19 lockdown), a song that the band "thought would resonate through the times we're living in" and their first original one since 2012. The song reached