The Okies migrated here to escape the Grapes of Wrath. Time to move back? Driving the 30-plus miles of Manning Avenue between Selma and San Joaquin today, we were buffeted by horizontal streams of dust the entire way. At this crossroads near Raisin City (!), that may or may not be oncoming traffic to my left above the side-view mirror. With visibility down to 20 feet at times, you hold your breath and speed across.