TJ removes his wet firefighting gear and prepares to enter the fire station and eat dinner on Oct. 10, 2013. TJ is a 3-year-old who has Langerhan cell histiocytosis. - TJ removes his wet firefighting gear and prepares to enter the fire station and eat dinner on Oct. 10, 2013. TJ is a 3-year-old who has Langerhan cell histiocytosis.