Most actors are lucky to play one iconic role over their careers. LeVar Burton has played at least three. Besides his breakthrough role in 1977's "Roots" and his career-defining turn as Lt. Commander Geordi La Forge in "Star Trek: The Next Generation," for over 20 years, Burton was best known to a few generations of American children as the host of PBS's "Reading Rainbow." The series went off the air in 2005, but Burton keeps "Reading Rainbow" alive as an app and an educational company. Plus, a look at the new iPad, and a discussion of why Blackberry Messenger will outlive the Blackberry phone.