You really have to wonder when you see stories like this:
"Bolivian immigrants Marcelo Ortega, a dump truck driver, and his wife, Jenny, who cleans houses, bought a brick-front Colonial in Herndon for $549,000 in February 2006. The payments are $4,200 a month, which grew unbearable as residential construction work slowed and Ortega's income dropped." http://www.washingtonpost.com/wp-dyn/content/article/2007/06/29/AR2007062902582_2.html
How could such a loan have been approved?
Marcelo notes that "My wife loves this house."