Opened in 1962, the TWA Flight Center (also known as the Trans World Flight Center) is designed by Eero Saarinen for Trans World Airlines at New York's John F. Kennedy International Airport (JFK). Conceived with notions of speed as well as references to a bird, the TWA features a prominent wing-shaped thin shell roof over the main terminal of the JFK. The concrete shell, which inspired Saarinen to develop curvilinear ceramic tiles, established the TWA as a modernist piece of architecture that challenged the modernist notion of simplistic linearity.