For their second single, the Nice created an arrangement of Leonard Bernstein's "America" which Emerson described as the first ever instrumental protest song. The track used the main theme of the Bernstein piece (from "West Side Story") but also included fragments of Dvořák's "New World Symphony". The single concludes with Arnold's three-year-old son speaking the lines "America is pregnant with promise and anticipation, but is murdered by the hand of the inevitable." The new arrangement was released under the title "America (Second Amendment)" as a pointed reference to the US Bill of Rights provision for the right to bear arms. In July 1968, Immediate Records publicised the single with a controversial poster picturing the group members with small boys on their knees, with superimposed images of the faces of John F. Kennedy, Robert F. Kennedy and Martin Luther King Jr. on the children's heads. A spokesman for the band said: "Several record stores have refused to stock our current single ... the Nice feel if the posters are issued in United States they will do considerable harm". During the tour that followed the release of their second album in July, the group spawned controversy when Emerson burned an American flag onstage during a performance of "America" at a charity event, "Come Back Africa" in London's Royal Albert Hall. The group were subsequently banned from ever playing the venue again.