Kayla Tovo paced next to her parked car, not sure what to expect. "Mom, what are you doing?" her little boy called out the window. "Give me a minute," she answered. A decade ago, Tovo manned a machine gun for the Army in Afghanistan. Yet the meeting she was about to go to, at a park in Huntington Beach, spooked her. On the drive over she'd stopped to buy a yellow rose. A yellow rose means friendship. A yellow rose means starting over. A yellow rose would express three words to someone she'd be meeting for the first time –...