SpilkaBilka said:
In the Falcon cockpit, when Luke, Ben, and Han are discussing what happened to Alderaan, add Luke's line, "It looks like sand people did this, all right. Look, there's gaffi sticks, bantha tracks. It's just… I've never heard of them hitting anything this big before."
Obi-Wan could then say that it wasn't the work of sand people and that it was the princess who did it. Or that it was Luke's father.