By Logan Ward, Special To The Washington Post Seeing the dust devil dance into view, my son finally snapped out of his teenage malaise. We were barreling east through the Mojave Desert on California Route 190, two hours into a four-day road trip. In the rearview mirror, the shrinking Sierra Nevadas. Ahead, treeless desiccation beneath the big, blue sky. Luther, 17, straightened from his slump.