This report addresses the following questions: 1) What were the construction costs of primary pedestrian and vehicle fencing miles completed under the [Secure Border Initiative] SBI program as of September 30, 2007, and October 31, 2008? 2) What were the construction costs of secondary pedestrian fencing completed along existing primary fencing as of October 31, 2008? 3) If appropriated SBI funds from fiscal years 2007 and 2008 that were allocated for SBInet had been used to construct fencing, how many additional miles of pedestrian or vehicle fencing could have been constructed?