Anthony Mason covers the life and legacy of artist Pablo Picasso; Jane Pauley interviews her former "Today" co-host Bryant Gumbel on the end of his HBO series, "Real Sports"; Tracy Smith interviews actor Dick Van Dyke (movie, "Dick Van Dyke: 98 Years of Magic"); global pop superstar/singer Kylie Minogue; Native American textile designer Naomi Glasses; toy maker Eddie Goldfarb; Martha Stewart shares tips about Christmas trees