$429 million — Money spent between 1998 and 2005 by the Department of Homeland Security and its precursors on border surveillance systems that were set off by the movement of animals, trains and wind before the program was scrapped for SBInet.

$1 billion — Money spent by Homeland Security between 2005 and 2011 on the SBInet virtual fence program before glitches and major delays prompted officials to cancel the program in January.

$750 million  —  Estimated cost of covering Arizona's 378 miles of border with technology over the next three to four years in the new initiative, dubbed the "Alternative (Southwest) Border Technology" plan.