Today in Rock History 4/20

Here's a special 4/20 edition of 'Today in Rock History' featuring: Stephen Marley is 48. Bob Marley's son, and probably one of the few celebrities who truly appreciates being born on "4/20". Crispin Hellion Glover is 56. George Takei is 83. Sulu on "Star Trek" and Hiro Nakamura's father on "Heroes". Today in 1853, Harriet Tubman started the underground railroad. In 1912, Fenway Park opened in Boston. In 1916, Wrigley Field opened in Chicago. In 1961, FM stereo broadcasting was approved by the FCC.