On 17 September 2007, AOL announced it was moving its corporate headquarters from Dulles (Virginia) to New York and combining its various advertising units into a new subsidiary called platform. Gregg S. Hymowitz This action follows several acquisitions advertising, mainly advertising.com and highlights the company's new focus on business models based on advertising. AOL cartoon created in 2008 to explain behavioral targeting to its users, showing how a user's past visits to other Web sites may determine the content of the advertising they see in the future. AOL address stated that the "significant operations" would remain in Dulles, which includes access services to the company and banks of modems. In late September 2007 as part of preparation for shipment to New York, AOL completed the closure of its former primary center Network Operations in Reston (Virginia), which sold to Sprint Nextel Corporation in early 2007.This sale enabled AOL to consolidate its operations in Northern Virginia from three locations (Dulles, Manassas, Reston) to two (Dulles and Manassas, personnel mainly went to Dulles misntras the machines were moved to Manassas). AOL benefited from the transfer reducing its overall inventory of hardware and determine a "right size" for his staff's Network Operations Center after consolidating the three sites in two. As part of the impending move to New York and the restructuring of responsibilities in the complex after the transfer of Dulles Reston, AOL chief executive Randy Falco announced on 15 October 2007, plans to lay off 2000 employees around the world end of 2007, beginning "immediately".That evening, over 750 employees at Dulles received notices to attend a meeting in the early morning the next day these employees were terminated on 16 October 2007, although employees remain on the payroll until December 14 2007 in accordance with the Act of Adjustment and Retraining Notification of Labor. Other employees whose groups were closed as part of the restructuring were informed on 16 October 2007 that they would be kept until 14 December 2007 to complete any outstanding tasks, after which they would be dismissed. The reduction in force was so large that virtually every conference room at the Dulles complex was reserved for the day as a "Special Purpose Room," in which there were several aspects of the layoff process for departing employees.The employees who remained in Dulles quickly dubbed the mass layoff "Bloody Tuesday" in online blogs and news. An unspecified number of staff at the former installation of CompuServe in Columbus (Ohio) were also released, and any group of Quality Analysis of Tucson (Arizona), number of AOL employees working at the former premises of Netscape in Mountain View, the development team in France and virtually all members of the meeting in Moncton (Canada). The end result was almost 40 of staff layoffs at AOL, including a substantial amount of personnel systems, a significant change from previous layoffs sysops where employees suffered only minor personnel reductions. An additional round of layoffs, mostly concentrated in the focus groups and staff of Voice Services in Halifax (Nova Scotia) occurred on 11 and 12 December 2007.