washington. it's a blustery day in puget sound, located in the northwest section of the evergreen state. winds are gusting a little more than 40 miles per hour, causing the tacoma narrow's bridge to really sway. surprising as it looks, the movement doesn't stop cars and pedestrians from crossing it. ever since the bridge's opening four months earlier, residents affectionately call her galloping gertie because of the way she dances and snakes in the wind. bridges are designed to move a little, but gertie's movements seem a bit extreme. for some residents, crossing her is like an adventure. >> it was a thrill. it was like a carnival ride. almost a roller coaster. >> historian and author richard hobbs writes about the tacoma narrows bridge in his book, "catastrophe to triumph." >> people would come out on a windy day when there was extra bounce in the bridge and walk