Aleida Ramirez is proud of her old driver's license. It's faded and battered, held together by tape in two places, and it expired two years ago.
But Ramirez wouldn't think of throwing it out.
"Because it's my treasure," Ramirez says. "I mean, this is the only proof that I've been living in this state. This is the only proof that I have that I've been working hard, that I want to be here."