In 2003, Simon and Garfunkel received a Lifetime Achievement Award at the 45th Annual Grammy Awards, for which the promoters convinced them to open with a performance of "The Sound of Silence". The performance was satisfying for both, and they planned a full-scale reunion tour. The Old Friends tour began in October 2003 and played to sold-out audiences across the United States for 40 dates until mid-December, earning an estimated $123 million. A second U.S. leg commenced in June 2004, consisting of 20 cities. Following a 12-city run in Europe in 2004, they ended their nine-month tour with a free concert along Via dei Fori Imperiali, in front of the Colosseum in Rome, on July 31, 2004. It attracted 600,000 fans, more than their Concert in Central Park. In 2005, Simon and Garfunkel performed three songs for a Hurricane Katrina benefit concert in Madison Square Garden, including a performance with singer Aaron Neville.