By 1980, the duo's solo careers were not doing well. To help alleviate New York's economic decline, concert promoter Ron Delsener suggested a free concert in Central Park. Delsener contacted Simon with the idea of a Simon & Garfunkel reunion, and once Garfunkel had agreed, plans were made. The concert, held on September 19, 1981 attracted more than 500,000 people, at that time the largest ever concert attendance. Warner Bros. Records released a live album of the show, "The Concert in Central Park", which went double platinum in the US. A 90-minute recording of the concert was sold to Home Box Office (HBO) for over $1 million. The concert created a renewed interest in Simon & Garfunkel's work. They had several "heart-to-heart talks", attempting to put their disagreements behind them. The duo undertook a world tour beginning in May 1982, but their relationship grew contentious: for the majority of the tour, they did not speak to one another.