Tammy Hattley: My dad was a trucker. He mostly hauled chemical tankers. He'd bring 'em to the house overnight before heading out sometimes. And I'd have nightmares, thinking about what could happen. But when my dad found out, he showed me a diamond-shaped decal on the back with the colors and numbers. He told me the numbers tell you how high the level of danger is. He only hauled level four, safest stuff. Once I knew that, it didn't seem so scary anymore.

Ray Nadeem: Level four is the most lethal code.

Tammy Hattley: But I didn't know that. And I didn't worry when he drove off every morning in a rolling fire bomb. The lies that keep us safe are the ones worth telling.