Delta Air Lines began as a crop dusting operation called Huff Daland Dusters, Incorporated. The company was founded on May 30, 1924 in Macon, Georgia, and moved to Monroe, Louisiana, in 1925. They flew a Huff-Daland Duster, the first true crop duster, designed to combat the boll weevil infestation of cotton crops. Collett E. Woolman, one of the original directors, purchased the company on September 13, 1928, and renamed it Delta Air Service. Service began on June 17, 1929 with the inaugural flight between Dallas, Texas and Jackson, Mississippi.Delta moved its headquarters to its current location in Atlanta in 1941, and continued to grow through the addition of routes and the acquisition of other airlines. It replaced propeller planes with jets in the 1960s and entered international competition to Europe in the 1970s and across the Pacific in the 1980s.Delta's more recent history is marked by its emergence from bankruptcy on April 25, 2007, and the subsequent merger with Northwest Airlines. The merger was announced April 14, 2008, and was set to create the world's largest airline. After approval of the merger on October 29, 2008, Northwest continued to operate as a wholly owned subsidiary of Delta until December 31, 2009 when both carriers' operating certificates were merged (the Delta certificate was kept). Delta completed integration with Northwest on January 31, 2010 when their reservation systems and websites were combined, and the Northwest Airlines brand was officially retired.