Why was the Tacoma bridge famous?

The Tacoma Narrows Bridge, completed in 1940, is famous for its dramatic collapse just a few months after opening due to aeroelastic flutter. The event highlighted the importance of aerodynamics in bridge design, as the bridge's design did not adequately account for wind forces. The collapse was captured on film, making it a significant case study in engineering and a cautionary tale for future bridge construction. It became popularly known as "Galloping Gertie."