To kick off Canada's Centennial year, the CBC commissioned Lightfoot to write the "Canadian Railroad Trilogy" for a special broadcast on January 1, 1967. Between 1966 and 1969, Lightfoot recorded four additional albums for United Artists: "The Way I Feel" (1967), "Did She Mention My Name?" (1968), "Back Here on Earth" (1968), and the live recording "Sunday Concert" (1969), and consistently placed singles in the Canadian top 40, including "Go-Go Round", "Spin, Spin", and "The Way I Feel". His biggest hit of the era was a rendition of Bob Dylan's "Just Like Tom Thumb's Blues", which peaked at No. 3 on the Canadian charts in December 1965. "Did She Mention My Name?", released in January 1968, featured "Black Day in July", about the 1967 Detroit riot. Weeks later, upon the assassination of Martin Luther King Jr. on April 4, radio stations in 30 states pulled the song for "fanning the flames", even though the song was a plea for racial harmony. Lightfoot stated at the time radio station owners cared more about playing songs "that make people happy" and not those "that make people think." Unhappy at a lack of support from United Artists, he defected to Warner Bros. Records, scoring his first major international hit in early 1971 with "If You Could Read My Mind".