Tossing and Turning

On today’s show: Major League Baseball pitchers Tim Wakefield and Phil Niekro explain the strange art of the knuckleball, along with Ricki Stern, who directed the documentary “Knuckleball!” Jacques Berlinerblau defends the virtues of secularism. Kevin Powers, a veteran of the war in Iraq, discusses his novel, The Yellow Birds, a harrowing story of two young soldiers fighting for their lives. Pankaj Mishra tells us about the great thinkers whose ideas shaped contemporary China, India, and the Muslim world.