Actor Karl Malden, who won an Oscar playing opposite Marlon Brando in "A Streetcar Named Desire" and became known to millions as the American Express pitchman who warned, "Don't leave home without it," died Wednesday at his home in Brentwood at age 97. Malden died of natural causes, the actor's daughter, Mila Doerner, told the Los Angeles Times. The Chicago-born actor was ironically raised in Gary, Ind., the same town that was home to Michael Jackson and his family. He began his acting career on Broadway, where he worked with then-fledgling director Elia Kazan, who directed him in the stage