Trachea annular ligaments of trachea. The epiglottis closes the opening to the larynx during swallowing. The trachea develops in the second month of development. It is lined with an epithelium that has goblet cells which produce protective mucins (see "Respiratory epithelium"). An inflammatory condition, also involving the larynx and bronchi, called croup can result in a barking cough. A tracheotomy is often performed for ventilation in surgical operations where needed. Intubation is also carried out for the same reason by the inserting of a tube into the trachea. From 2008, operations have experimentally transplanted a windpipe grown by stem cells, and
United We Stand: What More Can I Give this was because Jackson signed a contract with CBS (the former owner of his record label) over the 30th Anniversary Special to not appear under his name in any other program; the airing of "Man in the Mirror" at an awards ceremony was also canceled. John Stamos hosted the event, and appearances were also made by celebrities including Kevin Spacey along with political figures such as the mayor of Washington, D.C.. United We Stand: What More Can I Give United We Stand: What More Can I Give was a benefit concert led by Michael Jackson held on October 21, 2001