sometimes confuses cars for humans and it performs poorly in bad weather. four years and countless setbacks later, the government is saying enough is enough. one of the few things that both democrats and republicans agree upon is the colossal failure of this costly project. >> we cannot continue to invest hundreds of millions of dollars of taxpayer money into something if we're not confident it's really going to work. >> this virtual fence, which has already consumed hundreds of millions of dollars of taxpayers' money, has been a complete failure. >> reporter: so who is accountable? just about everyone involved in the project. two different administrations, two different homeland security departments, congress, and the company that built the virtual fence. the boeing company received almost $1 billion of taxpayers' money for the effort, and appears to be in denial. in a statement the company says, boeing stands behind its work on the sbi net system as a reliable, effective border