Peter, Paul and Mary were one of the most successful folk-singing groups of the 1960s. The trio comprises Peter Yarrow, Noel "Paul" Stookey and Mary Travers. They recorded their first album, Peter, Paul and Mary, the following year. It included "500 Miles", "Lemon Tree" and the Pete Seeger hit tunes "If I Had a Hammer" and "Where Have All the Flowers Gone?". The album was listed on the Billboard Magazine Top Ten list for ten months and in the Top One Hundred for over three years. By 1963 they had recorded three albums. All three were in the Top 10 the week of President Kennedy's assassination. That year the group also released "Puff the Magic Dragon", which Yarrow and Leonard Lipton had written in 1959, and performed "If I Had a Hammer" at the 1963 March on Washington, best remembered for Reverend Martin Luther King, Jr.'s "I Have a Dream" speech. Their biggest hit single was the Bob Dylan song "Blowin' in the Wind," an international #1 and the fastest selling single ever cut by Warner Bros. Records. They also sang other Bob Dylan songs, such as "The Times They Are a-Changin'" or "When the Ship Comes In". For many years after, the group was at the forefront of the civil rights movement and other causes promoting social justice. "Leaving On A Jet Plane," which in December 1969 became their only #1 hit, was written by John Denver, and first appeared on their Album 1700 in 1967. "Day Is Done," a #21 hit in June 1969, was the last Hot 100 hit the trio recorded.