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Plant quarantine inspector examining tourist baggage before entering California. Yuma, Arizona. ['Why Inspect Baggage? To prevent the entry of plant pests into California, which would endanger crops valued at $500,000,000 annually. Please co-operate - Thank you: Bureau of Plant Quarantine, California Department of Agriculture']. Plant quarantine inspector examining tourist baggage..., Yuma, Arizona, 1937. Creator: Dorothea Lange. (KEYSTONE/HERITAGE IMAGES/Heritage Art)