BANGKOK (AP) -- Japanese automakers Honda and Nissan will attempt to merge and create the world's third-largest automaker by sales as the industry undergoes dramatic changes in its transition away from fossil fuels. The two companies said they had signed a memorandum of understanding on Monday and that smaller Nissan alliance member Mitsubishi Motors also had agreed to join the talks on integrating their businesses. Honda will initially lead the new management, retaining the principles and brands of each company. Following is a quick look at what a combined Honda and Nissan would mean for the companies, and for the auto industry.