 Opening statements began today in the Alec Baldwin-Russ trial in New Mexico. The actor accused of manslaughter in the fatal shooting on the set of the movie when the gun he was rehearsing with fired a live round killing the cinematographer. ABC News legal contributor Brian Buckmeyer says prosecutors can only address Baldwin's actions as an actor, not the movie's producer. They cannot prove that the environment in which it was created by him or others led to this recklessness. And they have to also adjust and respond to what we're going to see