Homeland Security: Unmanned Aerial Vehicles and Border Surveillance [Updated May 13, 2008] [open pdf - 70KB]
From the Summary: "Congress has expressed a great deal of interest in using Unmanned Aerial Vehicles (UAVs) to surveil the United States' international land border. This report examines the strengths and limitations of deploying UAVs along the borders and related issues for Congress. This report will be updated as events warrant."
CRS Report for Congress, RS21698