Thailand's Crown Prince Maha Vajiralongkorn cycles in the “Bike for Mom” event in Bangkok, Thailand, August 16, 2015. Thai Crown Prince Maha Vajiralongkorn led 40,000 cyclists on a 43-km (27-mile) course in Bangkok on Sunday, to celebrate the 83rd birthday of Thailand's Queen Sirikit, which fell on August 12. (Photo by Athit Perawongmetha/Reuters)
