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Caption: As of May 2015, DHS installed 353 miles of primary pedestrian fencing, 300 miles of vehicle fencing (total of 653 miles), 36 miles of secondary fencing behind the primary fencing, and 14 miles of tertiary pedestrian fencing behind the secondary fence. The Border Patrol reportedly had identified a total of 653 miles of the border as appropriate for fencing and barriers. Figure 3 summarizes annual appropriations for tactical infrastructure (including surveillance technology) for FY1996-FY2016. Appropriations increased from $25 million in FY1996 to $298 million in FY2006, an 11-fold increase (8-fold when adjusting for inflation), and then jumped to $1.5 billion in FY2007 as DHS created a new Border Security Fencing, Infrastructure, and Technology (BSFIT) account and appropriated money to pay for the border fencing mandate in the Secure Fence Act of 2006. BSFIT appropriations decreased for seven consecutive years (from FY2007 through FY2013); however, in FY2016 BSFIT appropriations increased to $447 million (from $382 million in the previous fiscal year).