The world Street Journal published that United Airlines is not covering its cost (including both fixed and variable costs) in the route from Washington to San Francisco. Therefore, they should discontinue the flight in this route. Based on the above situation, answer the following questions: 

1. Do you think United should continue its flight from Washington to San Francisco? Explain. 

2. What are the major conditions United needs to check before 'shut down' its operation Washington to San Francisco? Explain.