The cowboy love story "Brokeback Mountain" led the Academy Awards field Tuesday with eight nominations, among them best picture and honors for actor Heath Ledger and director Ang Lee. Also nominated for best picture were the Truman Capote story "Capote"; the ensemble drama "Crash"; the Edward R. Murrow chronicle "Good Night, and Good Luck"; and the assassination thriller "Munich." The Johnny Cash biography, "Walk the Line," considered a likely best picture nominee, was shut out, though Joaquin Phoenix and Reese Witherspoon earned acting nominations for the film. George Clooney picked up two nominations, as supporting actor for his role as...