Rusty Young, a cofounder of Poco and the band's only constant member since its formation in 1968, has died. He was 75. An official statement released by his record company notes that Young died yesterday of a heart attack at his home in Davisville, Mo. Young was born Norman Russell Young on Feb. 23, 1946, in Long Beach, Calif., but was raised in Denver. He began playing lap steel when he was young and performed in various country and psych-rock bands during his teenage years. By 1967, Young had relocated to Los Angeles, where he befriended Richie Furay, a member...