 How did the bomb get in Julia's suitcase?
I didn't want her to think I had taken it while she was out of the room, so I probed the contents of her purse, which she always kept in the upper right drawer of her desk. The bomb was in a small bag—a woman's bag judging by the soft, flimsy things you'd never find in a man's—and I didn't know it was a bomb right away. One went to a battery and the other to hard round cylinders taped together. We'd be leaving the valley for the mountain range north of Los Angeles soon, if we hadn't left it already. It was impossible to tell from this distance just which bag contained the bomb; I could hardly identify my own scarred suitcase.
 Julia's husband put the bomb in her suitcase before she left the house.
 Julia's sister slipped the bomb inside the suitcase before she left for the airport.  Julia put the bomb in her suitcase before she left home.  A terrorist at the airport grabbed Julia's bag at random and slipped the bomb inside.  Julia's husband put the bomb in her suitcase before she left the house.