who was the man in the red bandana

The man in the red bandana was Welles Crowther, a 24-year-old equities trader and volunteer firefighter who used a red bandana covering his nose and mouth to save many lives during the September 11, 2001 attacks. He made multiple trips guiding people from the 78th floor sky lobby of the South Tower to safety before the building collapsed. Crowther was known for always carrying the red bandana since childhood, and his heroic actions became widely known months after the attacks. He is commemorated at the 9/11 Memorial and Museum, where one of his bandanas is on display, and was the subject of a documentary called "Man in Red Bandana".