At the time of acquisition, J.L. Hudson was the nation's largest independently owned department-store company. Upon realization of the merger, Dayton Hudson Corporation became the 14th-largest nonfood retailer in the U.S., with combined sales over $800 million. Target Stores In an announcement made in July 1961, Dayton's entered a new era of shopping with a discount store chain to operate separately from Dayton's department stores. The new chain constructed stores in the Twin Cities area, and each store featured about 125,000 sq ft of retail space. This move was the first by a department store chain in the upper Midwest to enter the discount retailing field. Named Target, the new stores would become the model for continued success by U.S. retailers, in a class by itself, even as it approached its 60th anniversary. Its success was so great that, in time, Target Corporation survived Dayton's, the original parent company. The first Target store opened in May 1962 in Roseville, Minnesota, a suburb of St. Paul, Minnesota. Rapidly expanding, by the end of the year there were four Target stores, with locations in Roseville, Crystal, Duluth, and St. Louis Park, Minnesota. B. Dalton B. Dalton Booksellers was announced in April 1966 as a new book-store chain to be launched and wholly owned by Dayton's. After research, Dayton's believed book stores would be a successful merchandising field for the company, due in part to the increase in education and disposable income of Americans. Named after Bruce Dayton, the head of Dayton's at the time (and one of George Nelson Dayton's five sons), Dayton's intent from the beginning was for B. Dalton to be a national book-store chain, with locations across the U.S. In 1966, the average book-store chain's retail footprint per store was roughly 2,500–2,900 sq ft; B. Dalton's first store was to be 7,200 sq ft. In August 1966, the first B. Dalton Bookseller, in the Dayton-owned Southdale Center in suburban Edina, opened. Expansion developed quickly, with the next store in the chain opening in February 1967 in St. Louis, Missouri; another six stores were planned at that time. Dayton Hudson Corporation years 1970s The bombing of the women's restroom at the St. Paul store occurred in 1970. Another, larger bomb was found nearby, but failed to detonate. A juvenile, 15 years old at the time of the bombing, was convicted of the crime. Ridgedale, the fourth of the Dayton's "Dales"