Kepler mission - Tyson of NOVA science NOW

Through his numerous TV appearances and books (including the recently released The Pluto Files), astrophysicist Neil deGrasse Tyson has shared his infectious enthusiasm for discovery with worldwide audiences. Tyson's show on WGBH, NOVA scienceNOW, kicks off its fourth season on Tuesday night at 9:00, and we talked to him beforehand to get his thoughts on the state of science education and space