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The Salt Lake Tribune occasionally presents images from its archives in a special series called A Look Back.In remembrance of the 10th anniversary of the Sept. 11 attacks, this collection features some of the most iconic images from that time. It is part of The Tribune's overall look at how those events changed America. Other stories, both national and local, can be found at installments showed:Salt Lake City's Memory Grove Park • Hill Air Force Base in the 1940s and 1950s •'s fashion from 1949-50 • Lake City in the 1900s • Lake City and other Utah cities in the 1800s • from court actions against polygamous men in the 1940s • centennial Days of '47 parade in downtown Salt Lake City from July 1947 • town of Mercur, Utah • history • aircraft from around Utah • images of Eureka, Utah, in the early 1900s • Lake City's Liberty Park from 1935 to 1951 • images of the 100-year-old Hotel Utah, which is now The Joseph Smith Memorial Building • and events in Salt Lake City from the 1930s, '40s and '50s • images of Sugar House • images of Salt Lake City in the 1960s • gallery of the series is available at