June and July 2009. On October 29, 2009, they performed five songs at the 25th Anniversary Rock and Roll Hall of Fame Concert at Madison Square Garden. In January 2010, Garfunkel developed vocal problems following damage to his vocal cords as the result of an incident in which he had briefly choked on a piece of lobster. Their headlining set several months later at the 2010 New Orleans Jazz and Heritage Festival was difficult for Garfunkel. "I was terrible, and crazy nervous. I leaned on Paul Simon and the affection of the crowd," he told Rolling Stone several years later. Garfunkel was diagnosed with vocal cord paresis, and the remaining tour dates were cancelled. However, the two reunited two months later to perform "Mrs. Robinson" at an American Film Institute Life Achievement Award tribute to director Mike Nichols, in what Rolling Stone suggested might have been their last performance together. Garfunkel's manager, John Scher, informed Simon's camp that Garfunkel would be ready within a year, which did not happen, damaging relations between the two. Simon continued to publicly wish Garfunkel better health and praised his "angelic" voice. Garfunkel regained his vocal strength over the course of the next four years, performing shows in a Harlem theater and to underground audiences. In 2014, Garfunkel told Rolling Stone that he believed he and Simon would tour again, but said: "I know that audiences all over the world like Simon and Garfunkel. I'm with them. But I don't think Paul Simon's with them." In a 2015 interview with The Daily Telegraph, Garfunkel said: "How can you walk away from this lucky place on top of the world, Paul? What’s going on with you, you idiot? How could you let that go, jerk?" Asked about a reunion in 2016, Simon said: "Quite honestly, we don't get along. So it's not like it's fun. If it was fun, I'd say, OK, sometimes we'll go out and sing old songs in harmony. That's cool. But when it's not fun, you know, and you're going to be in a tense situation, well, then I have a lot of musical areas that I like to play in. So that'll never happen again. That's that." In February 2018, Simon announced his retirement from touring. Musical style and legacy Over the course of their career, Simon & Garfunkel's music gradually moved from a basic folk rock sound to incorporate more