A United Airlines flight from Los Angeles to Shanghai was diverted back to San Francisco when one of the pilots realized he had forgotten his passport after two hours in the air. Despite the embarrassing mistake, the airline provided meal vouchers and arranged for a new crew to continue the journey, resulting in a six-hour delay for the 257 passengers. This incident underscores the importance of travelers knowing their rights regarding flight diversions, as United’s policies and the Department of Transportation indicated no refund was required as long as passengers reached their destinations.