People watch as participants play in a swimming pool filled with pink and green plastic balls during a Guinness World Records attempt of the Largest Ball Pit as part of the "Pink October" campaign at Kerry Hotel in Pudong, Shanghai, China, on October 30. The event, aimed at raising awareness of breast cancer prevention, set the world record with one million balls in the 25-metre-long and 12.6-metre-wide  swimming pool, according to local media. Reuters/Aly Song