WASHINGTON - Osama Bin Laden talks tough, but other mujahedeen laughed at him in Afghanistan because he would get scared and bolt when under fire, a new documentary reveals. "When Bin Laden used to hear the explosions, he used to jump. He used to run away," his longtime friend Hutaifa Azzam says on "CNN Presents: In the Footsteps of Bin Laden." "I still remember that me, and my elder and younger brothers, we used to laugh," says Azzam, the son of Bin Laden's mentor in radical Islam, Abdullah Azzam. Abdullah Azzam and Bin Laden jointly created a mujahedeen support organization...